题目内容

choose the best answers to the questions your hear.

A. the companion
B. the collaborator
C. the energizer
D. the mind-opener

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更多问题

A. how to be a good friend
B. why some friendships end
C. hwo our friendships are different
D. ways to make friends with new people

A. a reporter
B. an actor
C. a scientist
D. a researcher

A. 窦房结
B. 房室结
C. 房室交界区
D. 心房
E. 心室