单项选择题

The output of our factory is now three times（）it was three years ago.

A．what
B．that
C．as
D．which

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单项选择题
Being a pop star can be quite a hard life, with a lot of traveling（）heavy schedules.

A．in relation to
B．as to
C．owing to
D．with regard to
单项选择题
Jean did not have time to go to the concert last night because she was very busy（）for her examination.

A．to prepare
B．to be prepared
C．preparing
D．being prepared
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