A. I think so. B. Are you kidding?
C. You’re welcome. D. It’s my pleasure.
A. What B. How much
C. How D. How many
A. trains B. is training
C. trained D. will train
A. broke B. was broken
C. recorded D. was recorded
A. If B. Because
C. Though D. When
A.都江堰 B.长城
C.大运河 D.北京故宫
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