单项选择题

Listening to loud music at rock concerts______caused hearing loss in some teenagers.

A．is
B．are
C．has
D．have
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单项选择题
I want to know how the money was used______and whether it is used in a reasonable way or not.
A．in detail
B．in general
C．in demand
D．in shape
单项选择题
We never dared to ask him a question,______
A．did we
B．didn’t we
C．dared we
D．daren’t we
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