2 Fill in can/can't or must/mustn't. 1) You __________ use my mobile if you want. 2) __________ I come tomorrow? - I don't think so. 3) You __________ smoke in the hospital. 4) There's nobody to help us. We __________ do it ourselves. 5) The water in the river is cold, but you __________ swim a little. 6) Ram __________ take his sister's CDs. 7) The weather is warm, but you __________ take an umbrella. 8) She __________ speak Chinese. 9) There's no time left. We __________ hurry up. 10) You __________ take the bus to get to the museum.