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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 . —Look! There stands a man over there behind the tree.I guess it ________ be Mr.Smith.
—It ________ be him.He has gone to his hometown.He left yesterday.
—It ________ be him.He has gone to his hometown.He left yesterday.
| A．may, can’t | B．can, mustn’t |
| C．must, may not | D．should, shouldn’t |
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