to reach them on the phone, we sent an email instead

 A. Fail  B. Failed  C. To fail  D. Having failed

D


解析:

本題考查非謂語動詞完成式的用法。強(qiáng)調(diào)非謂語動詞fail的動作在謂語動詞sent之前發(fā)生。

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A.satisfied

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2.

A.a(chǎn) little

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A.easy

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