单项选择题

If a substance is dissolved in water or heated, it may ______ a gas.

A．give into
B．give over
C．give off
D．give away
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单项选择题
The mayor didn’t have time so far to go into it ______ , but he gave as an idea about his plan.
A．in conclusion
B．at hand
C．at length
D．in turn
单项选择题
This house will probably come on the ______ next month.
A．fair
B．market
C．shop
D．store
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