单项选择题

The telephone（）four times in the last hour, and each time it（）for my roommate.

A. has rung; was
B. has been ringing; is
C. had rung; was
D. rang; has been

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单项选择题
She plays（）violin fairly well and makes a living by teaching（）violin.

A. the;不填
B. 不填;不填
C. a;不填
D. a; a
单项选择题
John walks（）than Paul.

A. more slow
B. much more slow
C. more slowly
D. many more slow
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