题目内容

For a long time, he hesitated whether he should tell us ____ what had happened．
A．at duskB．at lengthC．at presentD．at stake
B
词义辨析题。A．at dusk 在黄昏时刻       B．at length  详尽地C．at present目前    D．at stake 在危急关头 根据句意：他犹豫了好长时间是否要详尽的告知我们所发生的事情。选B
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