单项选择题

It was a very difficult task, and______ Burrows would stop to have a smoke.

A．every so often
B．often so every
C．so every often
D．every often so
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单项选择题
A lawyer by training ______ he was, he proved himself to be a great novelist.
A．since
B．as
C．if
D．like
单项选择题
If you want the rainbow, you've got to______the rain.
A．get up with
B．put up with
C．come up with
D．catch up with
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