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
A. In fact B. At the same time
C. At first D. From then on
A.古人类化石 B.史学论著 C.影视作品 D.口述史料
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