单项选择题

In drug stores, there are many medicines（）.

A.for sell
B.on sell
C.for sale
D.on sale

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单项选择题
Everyone supported him, because his arguments （） sound facts.

A.rested up
B.rested on
C.reported on
D.reposed on
单项选择题
The students were required to write an article to （） the claim that the earth is not round.

A.retain
B.refute
C.deny
D.dispute
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