题目内容

I’m sorry to keep you ______ for an hour. Now let’s begin our work.
A．to waitB．waitingC．waitD．waited
B

试题分析：句意为：很抱歉让你等了一个小时。现在让我们开始工作吧。keep sb doing是习惯用法，表示“一直做某事”，故选B。
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