電子課本網(wǎng) › 第49頁(yè)

第49頁(yè)

信息發(fā)布者：

ake

ust

tudents

ustn't

mustn't/can't/

shouldn't

作業(yè)精靈老師示例

S1：To cross the road safely, what must you do?

S2：I must look for a zebra crossing and look at the traffic lights.

S1：To cross the road safely, what mustn't you do?

S2：I mustn't play football on the road or play on the zebra crossing.

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