2014考研英语：全真模拟题及答案解析(七)
Section I Structure and Vocabulary
In each question, decide which of the four choices given will most suitably complete the sentence if inserted at the place marked. Put your choice on the answer sheet. (20 points)
1. A variety of small clubs can provide _____ opportunities for leadership, as well as for practice in successful group dynamics.
[A] durable
[B] excessive
[C] surplus
[D] multiple
2. By turning this knob to the right you can _____ the sound from this radio.
[A] amplify
[B] enlarge
[C] magnify
[D] reinforce
3. Under the _____ confronting them it was impossible to continue the strike any longer.
[A] surroundings
[B] settings
[C] circumstances
[D] environments
4. We have the system of exploitation of man by man.
[A] cancelled
[B] abolished
[C] refused
[D] rejected
5. We shall probably never be able to _____ the exact nature of these sub-atomic particles.
[A] assert
[B] impart
[C] ascertain
[D] notify
6. This diploma _____ that you have completed high school.
[A] proves
[B] certifies
[C] secures
[D] approves
