单项选择题

Only when we hurried to the airport（）the flight was cancelled．

A．we found
B．did we find
C．have we found
D．we have found

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单项选择题

There is no evidence（）he was on the site of the murder．

A．where
B．that
C．which
D．how

单项选择题

It was because of his good performance at the interview（）he got the job with the big company．

A．so
B．what
C．that
D．while

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