—He should have come to join in the thorough cleaning.
—He _____. I don’t think it was his turn.
A．needn’t have toB．needn’t have
C．didn’t have toD．doesn’t need to
C

試題分析：考查情態(tài)動詞：句意：--他本應該參加大掃除的。--他不必，我想沒有輪到他。A。needn’t have to表達不對，B.needn’t have是本不必做而做了，和句意不符合，D是現(xiàn)在不必，而這句話表示過去不必要，選C。
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