单项选择题

Rice (has been) a (basically) food (for) millions of people for (hundreds) of years.

A．has been
B．basically
C．for
D．hundreds
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单项选择题
This new coat cost me______the last one I bought two years ago.
A．three times
B．three times as much as
C．three times as much
D．three times much as
单项选择题
Why not______Professor Li for help He is kind-hearted and willing to help.
A．ask
B．you ask
C．to ask
D．your asking
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