题目内容
The telephone ______ three times in the past twenty minutes, and each time it _____ for my roommate.
A. rang; was B. has rung; was C. rang; is D. has rung; is
B
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题目内容
The telephone ______ three times in the past twenty minutes, and each time it _____ for my roommate.
A. rang; was B. has rung; was C. rang; is D. has rung; is
B