单项选择题

We have produced twice as much steel this year（）4 years ago.

A．than we did
B．as we did
C．than we have produced
D．as we have produced

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单项选择题
He bought her what she wanted（）the fact that they were costly.

A．even if
B．as though
C．only if
D．regardless of
单项选择题
I became a teacher because I preferred books and people（）politics.

A．than
B．to
C．rather
D．against
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