`2.` I suggest using gas instead of burning coal

`3.` Why don't we reduce the amount of water we use every day?

`4.` I think we should use energy-saving appliances

`5.` I suggest you install a burglar alarm in your house.

`6.` Let's go out this evening

`7.` I think we should collect old clothes.

`8.` Why don't we drink a lot of water?

`9.` Shall we go to work by bikes instead of motorbikes to save energy

`10.` How about eating a lot of vegetables to lose weight?

`@` Kiến thức :

`-` Đề nghị: Suggest

`-` Shall we+ V..../Let's+ V.../How/What about+ Ving..../Why don't we + V ..

`=>` S+ suggested+ Ving: đề nghị cùng làm gì.

`-` Gợi ý cho người khác: "Why don’t you+ Vo?

`=>` S+ suggested+ that+ S+ should/shouldn't+ V