单项选择题

The problem has ______ simply because you didn't follow my instruction.

A．raised
B．risen
C．arisen
D．aroused
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单项选择题
He spoke so quickly that I didn't ______ what he said.

A．receive
B．accept
C．listen
D．catch
单项选择题
I don't think you've heard of him before, ______
A．don't I
B．do I
C．have you
D．haven't you
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