单项选择题


A．Only a few
B．Quite a few
C．Perhaps
D．Many
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单项选择题
A．whyB．and whatC．howD．and how
A．why
B．and what
C．how
D．and how
单项选择题
A．isB．areC．would beD．have been
A．is
B．are
C．would be
D．have been
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