题目内容
Sorry ________ you ________ for long.
[ ]
A．keeping; waiting
B．keep; waiting
C．to keep; wait
D．to keep; waiting
答案：D
解析：
解析：
|
解析： keep ab. doing sth.让某人总是做某事，上句可写为：I'm sorry to keep you waiting for long.对不起让你久等了。 |
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