In the meeting between human and bear, a wild-card factor (throws, throw) all calculations and studies to the wind.

The Yellowstone authorities should (has, have) kept thorough records on each bear.

When some bears (encounters, encounter) people, it is the bear who runs.

The great national parks (holds, hold) about 200 grizzlies, with possibly 30 of them being breeding females.

A two-tiered industry (is, are) emerging among European automakers.

Fiat CEO Sergio Marchionne, for example, (complains, complain) that German carmaker Volkswagen is creating "a bloodbath" among its competitors with discounts.

About 70 million vehicles (was, were) sold worldwide last year, and sales are expected to increase to 90 million by 2020.

The automobile industry (remains, remain) a growth sector worldwide despite the economic crisis in the southern European countries.

The gap between the winners and losers (continues, continue) to widen, creating a divided Europe in the automobile industry.

Behind an experimental fenced yard protecting campers in Glacier National Park, six visitors has been fatally mauled by grizzlies in the past 19 years.

Meandering downriver toward a deer, three grizzly cubs comes within 15 yards of it.

To a grizzly almost anything are food except rocks.

Lingering snow patches often become playgrounds for grizzlies observed making snowballs.

Female grizzlies mates every third year in summer, without their fertilized eggs implanting in the womb until fall.

Wild killer whales are not considered a threat to humans, although there has been cases of captives killing or injuring their handlers at marine theme parks.

A typical killer whale distinctively bears a black back, white chest and sides, and a white patch above and behind the eye.

Fish-eating killer whales prey on around 30 species of fish, particularly salmon, herring, and tuna.

Killer whales generally chooses to attack young or weak animals.

Both Democrats and Republicans (is, are) electing a new leader.

Neither threats nor hostile action (scares, scare) the enemy.

The actors and the director (understands, understand) the lighting problems.

The surfer or the swimmers (is, are) responsible for the littered beach.

A good diet and a realistic exercise plan (combines, combine) to help one lose weight.

A sweet potato and some carrots provides Vitamin A, important for healthy eyes.

The eyes or the skin is often adversely affected by a lack of Vitamin A.

Neither bleach nor dyes really helps unhealthy hair look better.

Ripe tomatoes, leafy Brussels sprouts, and a handy orange is rich in Vitamin C.

Unfortunately for the sedentary, neither diet nor vitamins alone provide sufficient fuel for good health.

One of the many cultures studied by anthropologists (is, are) the Kwakiutl Indians.

This group of Indians (lives, live) on the Canadian Coast.

Often the leader of the Kwakiutl dances, (foams, foam) at the mouth and (tosses, toss) burning ashes into the crowd.

Wealth, like cedar bark blankets, canoes, and large sculptured copper pieces, (is, are) important to the Kwakiutl.

To the Kwakiutl, one of the copper pieces, (equals, equal) a thousand cedar bark blankets.

The car with many riders (was, were) speeding around the curve.

The teacher along with her students (is, are) viewing a film.

One of the most enjoyable parties (was, were) given by Helen.

The mayor as well as his brothers (is, are) going to prison.

The boy at the door (is, are) my brother.

Kwakiutl ceremonies for showing one’s wealth is called "potlatches."

The host of a potlatch tries to shame his rival by displaying his wealth.

Exercise 6 – This group of sentences contains a mixture of correct and incorrect subject-verb combinations. Read each sentence carefully. Identify whether the sentence is correct: The host with all these goods sometimes even throw them into a giant bonfire.

Exercise 6 – This group of sentences contains a mixture of correct and incorrect subject-verb combinations. Read each sentence carefully. Identify whether the sentence is correct: The rival without equal amounts of riches feel greatly ashamed.

Exercise 6 – This group of sentences contains a mixture of correct and incorrect subject-verb combinations. Read each sentence carefully. Identify whether the sentence is correct: In our culture, some behaviors of the Kwakiutl Indian is not acceptable.

Exercise 7 — Each sentence below contains a choice for correct subject-verb agreement. Choose the correct answer. Among the animals, turtles cling to their basic structural design, while many others (is, are) experimenting their way to extinction.

Exercise 7 — Each sentence below contains a choice for correct subject-verb agreement. Choose the correct answer. Turtles are unique; each (has, have) eight cervical vertebrae, compared with seven of most mammals.

Exercise 7 — Each sentence below contains a choice for correct subject-verb agreement. Choose the correct answer. Turtles are honored in many countries; in China, for example, everyone (worships, worship) the legendary turtle named Dwei who created the universe.

Exercise 7 — Each sentence below contains a choice for correct subject-verb agreement. Choose the correct answer. Turtles have specific characteristics; all (displays, display) two plated decks: the upper, called the carapace, and the lower, known as the plastron.

Exercise 7 — Each sentence below contains a choice for correct subject-verb agreement. Choose the correct answer. Of the female turtles, some (has, have) been found to be twice the size of the males.

Exercise 8 — This group of sentences contains a mixture of correct and incorrect subject-verb combinations. Read each sentence carefully. If the subject and verb agree, select "Correct as written". If they do not agree, choose the corrected version. Among the fascinating facts about turtles, another are their patterns of dots, splashes, and hieroglyphs.

Exercise 8 — This group of sentences contains a mixture of correct and incorrect subject-verb combinations. Read each sentence carefully. If the subject and verb agree, select "Correct as written". If they do not agree, choose the corrected version. Aquatic turtles are different from land turtles: most is unable to close their shells.

Exercise 8 — This group of sentences contains a mixture of correct and incorrect subject-verb combinations. Read each sentence carefully. If the subject and verb agree, select "Correct as written". If they do not agree, choose the corrected version. Everyone knows Ogden Nash’s celebrated poem about turtles.

Exercise 8 — This group of sentences contains a mixture of correct and incorrect subject-verb combinations. Read each sentence carefully. If the subject and verb agree, select "Correct as written". If they do not agree, choose the corrected version. No one is going to bother snappers, eaters of anything from snakes and wooden canoe chunks to baby alligators.

Exercise 8 — This group of sentences contains a mixture of correct and incorrect subject-verb combinations. Read each sentence carefully. If the subject and verb agree, select "Correct as written". If they do not agree, choose the corrected version. However, of the early tribes, several uses turtles for food.

Exercise 9 — Each sentence below contains a choice for correct subject-verb agreement. Choose the correct answer. There (is, are) two classes of pure matter: elements and compounds.

Exercise 9 — Each sentence below contains a choice for correct subject-verb agreement. Choose the correct answer. There (has, have) been as many as 47 recessions in the United States since 1790.

Exercise 9 — Each sentence below contains a choice for correct subject-verb agreement. Choose the correct answer. There (stands, stand) a besieged monument known as Graceland, generator of big tourist dollars and the former home of Elvis Presley.

Exercise 9 — Each sentence below contains a choice for correct subject-verb agreement. Choose the correct answer. There (is, are) however, numerous elements that are man-made as well.

Exercise 9 — Each sentence below contains a choice for correct subject-verb agreement. Choose the correct answer. There (comes, come) a time when one must take a position that is neither safe, nor politic, nor popular.

Exercise 10 — Each sentence below contains a choice for correct subject-verb agreement. Choose the correct answer. It (has, have) long been known that the fat content of the blood may vary greatly at times.

Exercise 10 — Each sentence below contains a choice for correct subject-verb agreement. Choose the correct answer. If it (continues, continue) to run, your computer may become unresponsive.

Exercise 10 — Each sentence below contains a choice for correct subject-verb agreement. Choose the correct answer. It (goes, go) without saying that our volunteers love their work.

Exercise 10 — Each sentence below contains a choice for correct subject-verb agreement. Choose the correct answer. It (is, are) our responsibility to create change in the world.

Exercise 10 — Each sentence below contains a choice for correct subject-verb agreement. Choose the correct answer. It (was, were) a good day before everything went wrong.

Exercise 11 — Read each sentence carefully. If the subject and verb agree, select "Correct as written". If they do not agree, choose the corrected version. The receptionist in the entryway to the offices is able to answer your questions.

Exercise 11 — Read each sentence carefully. If the subject and verb agree, select "Correct as written". If they do not agree, choose the corrected version. All of the information in the documents are important.

Exercise 11 — Read each sentence carefully. If the subject and verb agree, select "Correct as written". If they do not agree, choose the corrected version. Anyone in one of the classes has to take the final exam.

Exercise 11 — Read each sentence carefully. If the subject and verb agree, select "Correct as written". If they do not agree, choose the corrected version. The coordinator of community services are arranging the program.

Exercise 11 — Read each sentence carefully. If the subject and verb agree, select "Correct as written". If they do not agree, choose the corrected version. Most of the car are covered with mud.

Exercise 11 — Read each sentence carefully. If the subject and verb agree, select "Correct as written". If they do not agree, choose the corrected version. Nothing more is going to be completed today.

Exercise 11 — Read each sentence carefully. If the subject and verb agree, select "Correct as written". If they do not agree, choose the corrected version. The drinks in the pitchers on the table in the ballroom is for everyone.

Exercise 11 — Read each sentence carefully. If the subject and verb agree, select "Correct as written". If they do not agree, choose the corrected version. Everybody were told to be here at 8:00, but somebody is not here.

Exercise 11 — Read each sentence carefully. If the subject and verb agree, select "Correct as written". If they do not agree, choose the corrected version. Some of the meetings at the conference are limited to ten participants.

Exercise 11 — Read each sentence carefully. If the subject and verb agree, select "Correct as written". If they do not agree, choose the corrected version. The sauce on the vegetables in the yellow bowl taste really delicious.

Exercise 12 — Choose the best answer. The girls from John Carroll (is, are) arriving early for class.

Exercise 12 — Choose the best answer. The heads of state (arrive, arrives) for the conference.

Exercise 12 — Choose the best answer. The bag of golf balls (is, are) for practice.

Exercise 12 — Choose the best answer. The boxes of chalk (is, are) at the chalkboard.

Exercise 12 — Choose the best answer. A shipment of clothing (is, are) expected soon.

Exercise 12 — Choose the best answer. A little practice in the evenings (help, helps) us play better.

Exercise 12 — Choose the best answer. The little baby with the dimples (slide, slides) down the bank.

Exercise 12 — Choose the best answer. The problems with Bobby (has, have) to be solved.

Exercise 12 — Choose the best answer. A package from my daughters (was, were) left on the doorstep.

Exercise 12 — Choose the best answer. The courses in college (require, requires) a lot of studying.

Choose the best answer: Only one of all my friends (has, have) written to me.

Choose the best answer: All of the dogs in the neighborhood (is, are) barking.

Choose the best answer: All of the CDs, even the scratched one, (is, are) in this case.

Choose the best answer: 15 percent of all persons in the class (answer, answers) the questions correctly.

Choose the best answer: About one-fourth of the population of Canada (live, lives) in the province of Toronto.

Choose the best answer: Some of the items in the itunes library (was, were) not copied.

Choose the best answer: A number of this magnitude (requires, require) 5 bytes to store.

Choose the best answer: The number of employees who were present (was, were) small.

Choose the best answer: The number of participants (was, were) greater in summer than in winter.

Choose the best answer: The number of plants in each plot (was, were) 25.

Choose the best answer: A number of people (was, were) present during on the launching of the new products.

Choose the best answer: The number of people lined up for tickets (was, were) four hundred.

Choose the best answer: A number of suggestions (was, were) made.

Choose the best answer: There (is, are) a number of important announcements in the bulletin.

Choose the best answer: Here (is, are) the number of milk shakes you requested.

Choose the best answer: Two cups of flour (seems, seem) too much for the recipe.

Choose the best answer: Three days (was, were) all the time needed for the tour.

Choose the best answer: Two hours of homework in one subject (is, are) unfair.

Choose the best answer: Three weeks of rehearsal time usually (proves, prove) to be sufficient.

Choose the best answer: Fifty cents (is, are) more than enough for your allowance.

Choose the best answer: The group (was, were) going on a trip.

Choose the best answer: That flock of geese (make, makes) a beautiful pattern in the sky.

Choose the best answer: The team (is, are) celebrating its victory.

Choose the best answer: In July the committee (make, makes) a decision about the location of the August picnic.

Choose the best answer: In the jungle, the herd often (stampede, stampedes).

Choose the best answer: Next week the Smith family (leave, leaves) for vacation.

Choose the best answer: Every summer the class (take, takes) many field trips.

Choose the best answer: The panel (choose, chooses) the topics for television.

Choose the best answer: (Is, Are) the group in charge of refreshments here yet?

Choose the best answer: The company (vote, votes) for a new president next month.

Choose the best answer: “The Seven Sisters” (is, are) a story about a New England family.

Choose the best answer: Morgan and Company (advertises, advertise) beach bags for a dollar.

Choose the best answer: The Veterans of Foreign Wars (is, are) holding its convention in Chicago this year.

Choose the best answer: The Women (was, were) written by Clare Boothe Luce.

Choose the best answer: Wales (has, have) a beautiful countryside.

Choose the best answer: Economics (is, are) taught by Professor Gray.

Choose the best answer: The news on the radio (was, were) very encouraging.

Choose the best answer: Ethics (is, are) a code of values.

Choose the best answer: Politics (appeal, appeals) to some people.

Choose the best answer: Civics (was, were) my dad's best subject.

Choose the best answer: Measles (is, are) very contagious.

Choose the best answer: Social Studies 101 (has, have) always been an interesting course.

Choose the best answer: Aerobics (is, are) a fun activity for most youngsters.

Choose the best answer: Gymnastics often (require, requires) the use of special apparatus.

Choose the best answer: Acrobatics (involve, involves) skills in agility and balance.

Choose the best answer: Someone (has, have) to do the work.

Choose the best answer: Steve, along with Jim and Cindy, (was, were) there.

Choose the best answer: Where (is, are) you going?

Choose the best answer: There (go, goes) Emily and Claire.

Choose the best answer: Each of the members (has, have) contributed.

Choose the best answer: Meg and her mother (is, are) in the store.

Choose the best answer: The set of rules (control, controls) the game.

Choose the best answer: Neither the boss nor her assistant (was, were) present.

Choose the best answer: Here (is, are) an old and famous landmark.

Choose the best answer: Ralph, along with his father, (is, are) attending the game.

Choose the best answer: One often (ask, asks) for help from others.

Choose the best answer: Where (has, have) you and Rachel worked during the summer?

Choose the best answer: The leader of the choir (sing, sings) tenor.

Choose the best answer: The helpers, as well as the leader, (has, have) to work well.

Choose the best answer: Everyone (hope, hopes) to find a special friend.

Choose the best answer: A sign of the times (is, are) the fashion in clothes.

Choose the best answer: There (is, are) opportunities for all.

Choose the best answer: The travelers, with their translators, (visit, visits) the museum.

Choose the best answer: The better of the two seats (has, have) been sold.

Choose the best answer: Where (is, are) my hat and coat?

Choose the one phrase that best completes the sentence: Nondurable goods ________ for immediate use and often less expensive than durable goods.