1. You must put out all smoking materials. (passive voice)

→ All smoking materials should be put out.

2. You must fasten the seat belt. (passive voice)

→ The seat belt must be fastened.

3. Our government will make more progress in gender discrimination. (passive voice)

→ More progress in gender discrimination will be made by our government.

4. You should read the safety instruction. (passive voice)

→ The safety instruction must be read.

5. They need not buy bread. (passive voice)

→  Bread need not be bought.

6. People have shown more than 50 films in Hanoi since June. (passive voice)

→ more than 50 films have been shown since June in Hanoi.

7. Will they teach French in our school next year? (passive voice)

→ Will French be taught in our school next year?

8. Very young children shouldn't eat sugary food. (passive voice)

→ Sugary food shouldn't be eaten by very young children.

9. The living room isn't as large as the kitchen. (than)

→ The kitchen is larger than the living room.

10. This train is more convenient than all the others. (most)

→ This train is the most convenient.