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1 . According to the new traffic rules, people ________ wear a helmet when riding an e-bike.
A.might | B.may | C.can | D.must |
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2 . A: ________ (我必须完成) my homework now?
B: No, you needn’t. You________ (可以做) it tomorrow. (根据汉语提示完成句子)
B: No, you needn’t. You
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