Complete the sentences with must, mustn't, have to or don't have to.
1 You speak loud in the hospital.
2 You fill in all the form your name and signature are enough.
3 I remember to go to the chemist's. I've got a sore throat.
4 I feel fine, but my doctor tells me that I take more exercise.
5 Thanks, but you really — help me - I can do it myself.
6 You eat before your operation. It's dangerous! -
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