单项选择题

A well-written composition need good choice of words and clear organization among other things.

A．calls on
B．calls for
C．calls up
D．calls off
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单项选择题
Our teacher notified us that there would be test on Monday.
A．advised
B．assured
C．informed
D．disclosed
单项选择题
We cannot always count on the wind, so new windmills should be so designed that they can also be driven by water.
A．hang on
B．depend on
C．hold on
D．come on
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