Skills 1-36 | TOEFL Review

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

• For a number of horses

• The number of horses

• When the number of horses

• That the number of horses

Because of his reservations 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

• emitting

• they emit

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

• so we will have to double

• and it must double

• which it must be doubled

• we must double

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

The incorrect part of the sentence is ... .

• 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

Automakers 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.

• a country

• investments

• fixed

• are vital

John Chapman became famous in American folklore as “Johnny Appleseed” after he plants apple trees throughout the northeastern part of the United States.

• 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