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第40页

信息发布者：

run

play football

go when there is a red man

S1: What must we do on the road?

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

S1: What mustn't we do on the road?

S2: We mustn't run or play on the road.

iet

ustn't

oad

afe

ever

rossing

ights