Complete the sentences with must, mustn't, have to or don't have to. 1. you __ smoke in the hosputal. 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!