Помогите плиссFull in the necessary modal verb

1. Sally's husband can play football and tennis but he can't not cook or iron. 2. May I ask you a question? - You certainly can. 3. You should not put so mush sugar in your tea. 5. Could I do anything for you? 6. We were to meet at 5 but I have put off the meeting till later. 7. Sorry madam. You can not smoke here. S. You must be more attentive next time. 9. We can phone her at her office. She must be still working 10. In many countries people can drive the car at the age of 16.