单项选择题

Since last year, she ______ of the long distance.

A．have covered three fifth
B．have covered three fifths
C．has covered three fifths
D．has covered three fifth

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单项选择题

Does Tom know any other foreign languages ______ English

A．but
B．except
C．besides
D．beside

单项选择题

There was a second knock at the door. It was the second time I ______ that afternoon.

A．was interrupted
B．was interrupting
C．had interrupted
D．had been interrupted

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