can may must have to need 用所给词正确形式填空1.

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must can may have to needn't must
can't can't have to need
======以下答案可供参考======
供参考答案1:
mustcancanmightneedn't
mustcann't
can'tneed to
must供参考答案2:
1. Must 2. Can 3. May 4. have to 5. don't have to 6. must 7. can't 8. can't 9. must 10. have to
供参考答案3:
1.Must.2.Can 3.May.4.have to 5.needn't.6.must.7.couldn't.8.can't.9.must.10.have to.