Toefl Exercise (Skills 7-8)

1.- Today, the true story of ________ at Little Bighorn remains a mystery.

• a) happened

• b) it happened

• c) what happened

• d) what happening

2.- For more than a decade, _______ that certain species are becoming scarce.

• a) the warnings of bird-watchers

• b) warm the bird-watchers

• c) bird-watchers have warned

• d) a warning for bird-watchers

3.- Early in the eighteenth century, Halley accurately predicted when _______ of 1682 would return.

• a) the comet

• b) was the comet

• c) the comet was

• d) had the comet

4.- No single factor explains why _______ vary so greatly among individuals.

• a) aging affects

• b) the effects of aging

• c) aging has an effect

• d) the aging effect

5.- Lack of clarity about _______ the party in the coming year will be removed at the party's convention.

• a) will lead

• b) lead

• c) they will lead

• d) who will lead

6.- We do not _______ the bow drill was first developed for woodworking or fire making.

• a) whether it

• b) know whether it

• c) know whether

• d) sure whether

7.- Minute Man National Historical Park is a monument to where _______.

• a) the beginning of the Revolutionary War

• b) in the beginning of the Revolutionary War

• c) the Revolutionary War to begin

• d) the Revolutionary War began

8.- Tests on the colors of cars were conducted at the University of California to determine _______ the safest colors for cars.

• a) which

• b) which were

• c) if

• d) how were

9.- The National Institute of Dental Research estimates _______ in flouridated areas have about 25 percent less tooth decay than children elsewhere.

• a) for school children

• b) school children's

• c) that school children

• d) that for school children

10.- The process of photosynthesis explains how _______ able to use the energy in sunlight to manufacture foods from the simple chemicals in air and water.

• a) green plants

• b) green plants are

• c) planting greens

• d) with green plants are