单项选择题

We don't doubt ______ he can do a good job.

A．whether
B．that
C．how
D．why
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单项选择题
--Why didn't you tell Ann the truth-- ______.
A．Yes, I was afraid to be scolded by her
B．No, but I wanted to
C．But I did
D．I always hate telling lies
单项选择题
If Tim keeps working like this, he'll ______ sooner or later.
A．break down
B．give
C．get down
D．hold on
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