1,I think you should give up smoking immediately (had) I think you………….. 2,it is necessary for me to bring my passport (have) i …………. 3,I am sure that the cat is in the house somewhere (must ) …………….. 4,it is urgent that she visits the dentist as soon as possible (must) …………….. 5,it is important for you not to forget to lock the door before you leave (must) ……….. 6,never leave the candle burning without your attention(must) You…………………………

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