Вставить модальные глаголы can, may, must, need 1. why you understand it? it's so easy. 2. you not have bought the meat: we have everything for dinner. 3. i offer you something to drink? 4. he not drink alcohol when he drives.

1.can
2.need
3.may
4.must

1. Why can you understand it? It's so easy.
2. You need not have bought the meat: we have everything for dinner.
3. May I offer you something to drink?
4. He must not drink alcohol when he drives.