—Did you ask Tom for help?
—I ________. —I managed perfectly well on my own.
A．needn’t haveB．don’t need to C．didn’t need toD．needn’t
C

試題分析：句意為：——你向湯姆求助了嗎？——沒(méi)有必要，我自己就做得很完美了。題干中的最后一句是關(guān)鍵信息：既然我自己可以做得很好，就“不必”麻煩別人了。解題的關(guān)鍵是找出動(dòng)作發(fā)生的時(shí)間， 根據(jù)第一句話用過(guò)去時(shí)可以推測(cè)出空格處的時(shí)態(tài)也應(yīng)該是過(guò)去時(shí)。Needn’t have done本不必做而做了，和句意不符，選C。
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