to reach them on the phone.we sent an email instead.A．Fail B．FailedC．To fail D．Having failed 题目和参考答案——青夏教育精英家教网—

题目内容

________to reach them on the phone，we sent an email instead.

A．Fail B．Failed

C．To fail D．Having failed

【解析】

试题解析：句意：因为给他们打电话打不通，代替打电话我们发了邮件。强调非谓语动词fail的动作在谓语动词sent之前发生，使用Having done。故选D。

考点：考查谓语动词

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