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Dad, my computer is broken. Must it _____ now?
A．is repairedB．has been repairedC．be repairedD．has repaired
C

試題分析：句意：爸爸，我的電腦壞了。它必須現在修理嗎？It指代電腦，它與repair修理是被動關系，要用被動語態，系動詞be+動詞過去分詞；句中有情態動詞must，所以be要用原形，故選C。
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