2 Complete the sentences with muşt/mustn't or (don't/
doesn't) have to.
1 I can stay in bed tomorrow morning because
work.
2 Whatever you do, you
touch that switch. It's very dangerous.
3 My mother is a surgeon. Sometimes she
work at weekends.
We
leave yet. We've got plenty
of time.
The windows aren't dirty. You
clean them.
GIn many countries men
do military service.
buy a calculator.
You can use this.
8 This train doesn't go to London. You
change at Cambridge.
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