Use the verbs can and must in the correct forms:1 ... you tell me the way to the airport? 2. My English is very bad. I ... have some lessons to write a test. 3. It's my day off, so I ... get up as early as usual. 4. The boy fell into the river but fortunately we ... rescue him. 5. Children ... be left home alone. 6 ... you really introduce me to him? 7. She ... cook dinner yesterday. 8. He ... do it very well 10 years ago, he ... do it now and he ... do it in ten years, I'm sure. 9. You ... type the report yourself, your secretary ... do it for you. 10. We tried hard but we ... persuade him. 11. You ... touch that switch, it's dangerous.

1 Could you tell me the way to the airport? 2. My English is very bad. I must have some lessons to write a test. 3. It's my day off, so I don't have to get up as early as usual. 4. The boy fell into the river but, fortunately, we were able to rescue him. 5. Children must not be left home alone. 6. Could you really introduce me to him? 7. She had to cook / needn't have cooked dinner yesterday. 8. He could do it very well 10 years ago, he can do it now and he will be able to do it in ten years, I'm sure. 9. You don't have to type the report yourself, your secretary must do it for you. 10. We tried hard but we couldn't persuade him. 11. You mustn't touch that switch, it's dangerous.