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信息发布者：

2

4

1

3

afely

uickly

aits

eft

xcept

must

mustn't

Can

can't

must

must

mustn't

usy

oads

ross

afely

ebra

rossing

raffic

ights

reen

an

un

ars

ollow

tay

afe

I can't find a zebra crossing near me.

Must

follow

Yes

must

Why must you go to see the doctor?

keep quiet/listen to the teachers

talk/eat or drink

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