I. Complete the following sentences with: can/can't, could/couldn't, may may
not, might/ might not, must/musn't , should shouldn't and will/shall.
1. My mum....... drive until she had lessons when she was 35.
2. You ...... bring food and drink into the lab.
3. Waiters.... wear comfortable shoes at work.
4. We..... pay attention in class.
5. ...... We go out tonight?
6. you help me with my homework, Dad?