6. He was actively involved in the volunteer campaign.

7. I suggest we should organize a charity event to raise money.

- I suggest that a charity event should be organized to raise money.

- Why not organize a charity event to raise money?

- Shall we organize a charity event to raise money?

8. I suggest we should use banana leaves to wrap food.

- I suggest that banana leaves should be used to wrap food.

- What about using banana leaves to wrap food?

- Why don't we use banana leaves to wrap food?

9. He couldn't meet you since you are busy.

10. Because of his funny story, we laughed a lot.

6. He actively participated in the volunteer campaign.

⇒ He was actively involved in the volunteer campaign.

7. What about organizing a charity event to raise money?

⇒ I suggest we should organize a charity event to raise money.

- I suggest that a charity event should be organized to raise money.

- Why not organize a charity event to raise money?

- Shall we organize a charity event to raise money?

8. I think it would be better if we use banana leaves to wrap food.

⇒I suggest we should use banana leaves to wrap food.

- I suggest that banana leaves should be used to wrap food.

- What about using banana leaves to wrap food?

- Why don't we use banana leaves to wrap food?

9.He couldn't meet you because of being busy.

⇒He couldn't meet you since you are busy.

10.We laughed a lot because his story was funny.

⇒Because of his funny story, we laughed a lot.