听短文，选择。（4分） （1）_________________ at a red light. A. Let’s go B. Stop and wait C. Slow down and stop （2）How does John come to school? A. By bus. B. By bike. C. On foot. （3）We _________ pay attention to the traffic lights. A. shouldn’t B. must C. must not （4）---Does Amy often come to school by bike? ---_______ A. Yes, she does. B. No, she doesn’t. C. Yes, she is.
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