单项选择题


A．take pains
B．run risk
C．take a risk
D．make efforts
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单项选择题
A．will beB．appearC．areD．is
A．will be
B．appear
C．are
D．is
单项选择题
A．whichB．thatC．howD．why
A．which
B．that
C．how
D．why
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