单项选择题

Scientists say that many factors ______ changes in the weather.

A．bring in
B．bring off
C．bring about
D．bring forward
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单项选择题
With five hungry children seated round the table, the food disappeared ______.
A．at no time
B．at a time
C．at other times
D．at one time or another
单项选择题
Will you please lend me the novel when you ______
A．will finish
B．finish
C．finished
D．will have finished
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