单项选择题

Many a student（）the importance of learning a foreign language well at school.

A．have realized
B．has realized
C．have been realized
D． has been realized

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单项选择题
I wish that you（）such a bad headache because I'm sure that you would have enjoyed the concert.

A．hadn't
B．didn't have had
C．hadn't had
D．haven't had
单项选择题
She ought to stop work; she has a headache because she（）too long.

A．has been reading
B．is reading
C．had read
D．read
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