1．—I'm thinking of the test tomorrow. I'm afraid I can't pass this time.
—________！ I'm sure you'll make it.
A．Go ahead B．Good luck
C．No problem D．Cheer up
答案与解析：D 句意：——我正在考虑明天考试的问题，恐怕这次我会不及格。——振作起来，我相信你会通过的。根据上下文只有cheer up“振作起来”符合题意，而go ahead“继续”； good luck“好运气”； no problem“没问题”，均不符合题意。
2．We were prevented ________ the project on time by the bad weather.
A．to complete B．completed
C．completing D．from completing
答案与解析：D prevent...from在主动语态中from可以省去，在被动语态中from不能省去且from后跟v.ing形式。
