TOEFL EXERCISE (Skills 15–19)

Rarely ___ located near city lights or at lower elevations.

• observatories are

• are

• in the observatories

• are observatories

There are geographic, economic, and cultural reasons why ___ around the world.

• diets differ

• do diets differ

• are diets different

• to differ a diet

Were ___ millions of dollars each year replenishing eroding beaches, the coastline would be changing even more rapidly.

• the U.S. Army Corps of Engineers not spending

• the U.S. Army Corps of Engineers not spend

• the U.S. Army Corps of Engineers does not spend

• not spending the U.S. Army Corps of Engineers

Nowhere ___ more skewed than in the auto industry.

• that retail trade figures

• retail trade figures

• are retail trade figures

• retail trade figures

New York City’s Central Park is nearly twice as large ___ second smallest country, Monaco.

• as

• is the

• as is

• as is the

Potassium has a valence of positive one because it usually loses one electron when ___ with other elements.

• does it combine

• it combines

• in combining

• combination

The economic background of labor legislation will not be mentioned in this course, ___ be treated.

• trade unionism will not

• nor trade unionism will

• nor will trade unionism

• neither trade unionism will

___ test positive for antibiotics when tanker trucks arrive at a milk processing plant, according to federal law, the entire truckload must be discarded.

• Should milk

• If milk

• If milk is

• Milk should

Located behind ___ the two lacrimal glands.

• each eyelid

• is each eyelid

• each eyelid are

• each eyelid which is

Only for a short period of time ___ run at top speed.

• cheetahs

• do cheetahs

• that a cheetah can

• can