单项选择题

We should make mental preparation for failure, because there is only a(n)______number of possibilities of success.

A．infinite
B．finite
C．innumerable
D．numerous
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单项选择题
The hostess welcomed her guests in a ______manner, which made all the people present at ease.
A．spacious
B．suspicious
C．gracious
D．merciful
单项选择题
Did you hear someone ______in the next room all last night
A．moving about
B．moving along
C．moving off
D．moving on
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