单项选择题

He ______ for her for one hour by the time she arrived there.

A. has been waiting
B. has waited
C. had been waiting
D. waited
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问答题
你是一家服装厂公司的总经理，Mr. Smith 先生写信告知你所预订的衬衣样品还未送到，请你写信告诉他发生了什么事情。你的回信内容应包括： 1．对样品末按时到达表示道歉 2．样品迟到原因是生产部经理因病请假一周 3．已从市场部经理那得知样品已经上路，将在3天后到达 4．样品颜色只有3种可供选择，不能满足他要求的5种，对由此造成的不便表示抱歉
单项选择题
______ I can't help admiring the man's courage, I do not approve of his methods.
A. Unless
B. While
C. Since
D. Although
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