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n. 燈亮著 , 瑪麗一定在里面。Section B(1a1d) 任務 :選詞填空 you must (must/can) stop your car when the traffic lights turn red. a long walk, the old man must (can/must) be tired now. 3.—Someone will e to our music club guess it’s Mary. —It can’t (mustn’t/can’t) be left for England yesterday and will stay there for a week. 4.—Is driving here? —I’m not may (may/must) e by train. 5.—Can we run across the road now? —No, we mustn’t(couldn’t/mustn’t).We