摘要：You must be more careful! 32.You mustn't cross the road now. 33.If you want to cross a street, you must wait for the green light. 34.Please stand in line. 35.You must wait for your turn. 36.If you don't go soon, you'll be late. 37.I don't feel very well. 38.My head hurts. 39.You mustn't eat anything until you see the doctor.

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