Itisdifficult______aworldrecordandevenmoredifficultto______it.

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It is difficult ______a world record and even more difficult to ______it.

A. keeping, set

B. keep, set

C. set, keep

D. to set, keep

参考答案:

D参考译文:创造一项新的世界纪录很难,而要保持则更难。“创造世界纪录”应该是“setaworldrecord”,在此题中应该用动词不定式作前半句真正的主语,“保持”用“keep”,故选D。