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26. Peter ______ come with us tonight, but he isn’t very sure.

A. must

B. may

C. can

D. will

27. John, you ______ play with the knife. You ______ hurt yourself.

A. won’t, can’t

B. mustn’t, may

C. shouldn’t, must

D. can’t, shouldn’t

28. This box is too heavy, ______ give me a hand?

A. would you mind

B. would you please

C. will you like to

D. will you please to

29. ______ I water the trees on Tuesday? No, you needn’t.

A. Can

B. Must

C. May

D. Shall

30. The bus had left, so we ______ walk home.

A. have to

B. ought

C. had to

D. must

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