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
It is necessary to put bottles of pills out of ______ when there are small children around.
A．reach
B．hand
C．hold
D．place
单项选择题
Why ______ such a lot of money
A．you spend
B．to spending
C．spend
D．spending
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