Hearing a _____________ noise in the backyard, Pamela went there to have a look.
（A）cracking
（B）crack
（C）cracked
（D）cracker
参考答案
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更多大学英语选择题200道试题
- 1Careful surveys have indicated that as many as fifty percent of patients do not take drugs _____________ directed.
- 2To increase our working efficiency, it is necessary to _______ every moment we have.
- 3A dancer has to practice hundreds of times to achieve ___________ in performance.
- 4After the little girl lost her parents in the traffic accident, she kept __________ all the time and never smiled again.
- 5__________ for my illness I would have lent him a helping hand.
