单项选择题

The secretary worked late into night, ______ the long speech for the president.

A．to prepare
B．preparing
C．prepared
D．was preparing
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单项选择题
You have worked too hard and you'd better take a holiday northward or ______.
A．however
B．whatever
C．wherever
D．whichever
单项选择题
The reason why I plan to do so is ______ if I don't.
A．because she will be disappointed
B．that she will be disappointed
C．because she will have been disappointed
D．for she will be disappointed
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