单项选择题

A good title for this article could be" ______"

A． Are ail insects harmful
B． Which insects are harmful
C． Harmful insects.
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单项选择题
He went to the market ______.
A． to have his breakfast
B． to buy the beautiful carpet
C． just to have a look
单项选择题
He thought the price was ______.
A． high
B． low
C． reasonable
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