单项选择题


A．deduce
B．determine
C．prove
D．investigate
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单项选择题
A．explainsB．meansC．emphasizesD．conveys
A．explains
B．means
C．emphasizes
D．conveys
单项选择题
My uncle was crippled in middle age in a traffic accident and had to ____________ riding.
A．give out
B．give off
C．give up
D．give in
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