单项选择题

Our reporter has just called to say that rescue teams will ______ to bring out the trapped miners.

A．effect
B．affect
C．conceive
D．endeavor

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单项选择题
In the first paragraph, the word yet is used to introduce______.
A．contrast
B．a sequence
C．emphasize
D．an example.
单项选择题
The question is still______ discussion.
A．in
B．by
C．for
D．under
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