题目内容
21
A. It has a lot of places for entertainment.
B. It has never seen thunder and lighting.
C. It has fewer cloudy days than any other coastal city.
D. It has mild weather both in summer and in winter.
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22
A. It occurs when people are doing a repetitive activity.
B. It results from exerting one’s muscles continuously.
C. It happens when people engage in an uncommon activity.
D. It comes from staining one’s muscles in an unusual way.
23
A. Blood flow and body heat increase in the affected area.
Body movements in the affected area become difficult.
C. They begin to make repairs immediately.
D. They gradually become fragmented.
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