单项选择题

A) down C) up B) over D) under

A．down
B．over
C．up
D．under
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单项选择题
A) though C) however B) although D) yet
A．though
B．although
C．however
D．yet
单项选择题
A) relationship C) assumption B) relative D) associate
A．relationship
B．relative
C．assumption
D．associate
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