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題目列表(包括答案和解析)

By the end of last term we ___________ about ten English songs.
A．had learnedB．have learnedC．learnedD．were learning

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By the end of last month, I _____ all the CDs of Justin Bieber.
A．collectB．collectedC．have collectedD．had collected

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By the end of the last month, I _____________ all the CDs of Justin Bieber.
A．collectB．collectedC．have collectedD．had collected

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By the time we rushed to the hall, the party ________ for ten minutes.

A．had begunB．beganC．was onD．had been on.

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By the time she went outside, the bus ____ already ______ .

A．had, goneB．had, went C．has, goneD．has, went

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