Viết câu đề nghị, sử dụng Let's, What about, Why don't we

IV, Viết câu đề nghị, sử dụng Let's..., What about...?  Why don't we...?

1. go to the school cafeteria.

2. eat in fast food restaurant

3. do homework together.

4. play table tennis.

5. go to the beach.

6. go shopping.