16. Once ______ oxygen for more than five to seven minutes, the brain will be given damage that cannot be repaired.
A. escaped from B. deprived of
C. divided by D. drunk in
17. I live in the city, but on weekends, I sometimes go to the countryside ______ a change.
A. with B. for
C. on D. to
18. Although ten years has passed, the sweet smile of his late wife is still ______ his mind.
A. in B. over
C. on D. along
19. It is easy to make a promise, but hard to ______ it.
A. keep B. maintain
C. remain D. continue
20. Scientists Will have to come ______ new methods of increasing the world’s food supply.
A. up with B. down with
C. up for D. down to
21. He often acts ______ what will happen afterwards.
A. apart from B. as a result
C. with regard D. regardless of
22. An optimistic person always looks ______ rather than lives in sad memories.
A. up B. out
C. ahead D. through
23. The light and radio in his room are on. He ______ home.
A. could be B. must be
C. has to be D. needs to be
24. Whenever the young man ran ______ difficulties, he would turn to his father for help.
A. into B. over
C. out of D. short of
25. For example, the English used by a Canadian is not exactly like ______ used by an English.
A. one B. that
C. what D. those
26. Arthur has such a(an) ______ personality that everyone likes him.
A. pleasant B. easy
C. critical D. demanding
27. He was never ______. He didn’t want either fame or wealth. He just wanted to live a peaceful life.
A. interesting B. purposeful
C. prejudiced D. ambitious
28. Travel in space can be exciting; nevertheless it can be boring and lonely ______.
A. sometime B. some time
C. at time D. at times
29. Having been told that the inspector was coming to our class today, we all tried our best to ______ ourselves.
A. show B. present
C. behave D. defend
30. I was very upset at ______ a business trip to Beijing at this crucial moment.
A. his taking B. he takes
C. he took D. him to take
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