TOEFL Review Exercise Skills 1-36

______ in the United States declined from twenty million in 1910 to nine in 1970.

• For a number of horses

• When the number of horses

• That the number of horses

• The number of horses

Because of his reservation about the issue, ____ refused to vote for it.

• Who

• And

• Which the senator

• The senator

Bats avoid running into objects by ______ high-frequency sounds and listening for echoes.

• The emission

• Emitted

• They emit

• Emitting

It has been estimated that if we intend to stay above the starvation level, ____ the food supply.

• Which it must be double

• So we will have to double

• We must double

• And it must double

To determine an object’s force, the mass and speed of the object must be measure.

• To determine

• mass and

• the

• measure

The most common time for tornados to occur are in the afternoon or evening on a hot, humid spring day.

• most common

• tornados

• are

• hot, humid

Automaker Nissan and Ford and several aerospace research facilities in Great Britain are working lately to apply active noise cancellation to entire cars and planes.

• several

• are working

• active noise cancellation

• to entire

When a country in an early stage of development, investments in fixed capital are vital.

• country in

• investments

• fixed

• are vital

John Chapman became famous in American folklore as “Johnny Appleseed” A after he plants apple trees throughout the north-eastern part of the United State.

• famous

• plants

• throughout

• part of

Inasmuch he kept mostly to himself, the author of The treasure of the Sierra Madre was known as “ the mysterious B. Treuen.

• Inasmuch

• mostly

• to himself

• was