练习4：

1. Many fine cooks insist on ingredients of the highest quality.
A) demand
B) rely on
C) prepare for
D) create

2. Since the Great Depression, the United States government has protected farmers from damaging drops in grain prices.
A) slight
B) surprising
C) sudden
D) harmful

3. Cement was seldom used in building during the Middle Ages.
A) crudely
B) rarely
C) originally
D) symbolically

4. Nerve signals may travel through nerve or muscle fibers at speeds as high as two hundred miles per hour.
A) velocities
B) impulses
C) ratios
D) atrocities

5. The poet William Carols Williams was a New Jersey physician.
A) doctor
B) professor
C) physicist
D) resident

6. Medicine depends on other fields for basic information, particularly some of their specialized branches.
A) conventionally
B) obviously
C) especially
D) inevitably

7. We shall take the treasure away to a safe place.
A) clean
B) pretty
C) distant
D) secure

8. An important part of the national government is the Foreign Service, a branch of their specialized branches.
A) a unity
B) a division
C) an embassy
D) an invasion

9. The child s abnormal behavior puzzled the doctor.
A) bad
B) frightening
C) repeated
D) unusual

10.There is an abundant supply of cheap labor in this country.
A) a steady
B) a plentiful
C) an extra
D) a meager

11.In order to improve our standard of living, we have to accelerate production.
A) step up
B) decrease
C) stop
D) control

12.Gas does accumulate in the mines around here.
A) increase
B) spread
C) collect
D) grow

13. Our plan is to allocate one member of staff to handle appointments.
A) assign
B) persuaded
C) ask
D) order

14. Her behavior is extremely childish.
A) simple
B) immature
C) beautiful
D) foolish

15. We also want to use the water to irrigate barren desert land.
A) hairless
B) bare
C) empty
D) bald

Key :ADBAA CDBDB ACABB