题目列表(包括答案和解析)
30. The boss said to the secretary, “If you work well, you ______ have a rise.”
A. must B. ought C. would D. shall
29. In science fiction we read of flying saucers travel through _____ space, so people want to have ______ better knowledge of the universe.
A. the ; a B. / ; / C. the ; / D. / ; a
28. If you _____your promise, the results will be sure to satisfy you.
A. carry out B. carry on C. keep on D. keep out
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