1. Some body will clean the room later.

->The room will be cleaned later by some body

2. You mustn't open this parcel until Christmas Day.

->This parcel mustn't be opened until christmas day  

3. They can't make tea with cold water.

->Tea can't be made with cold water. 

4. The students will hold a meeting before the Teacher's Day.

-> A meeting will be held before the teachers' day by the students

5. People can recycle tires to make pipes or floor coverings.

->Tires can be recycled to make pipes or floor coverings

6. They should send applications before December.

->Applications should be sent before december

7. The manage must sign the contract today.

->The contract must be signed by the manager today

8. They will build the new bridge by the end of the year.

->the new bridge will be built by the end of the year.

9. We should use cloth bags instead of plastic bags.

->cloth bags should be used instead of plastic bags.

10. We can use the garbage to make fertilizer.

->the garbage can be used to make fertilizer.

1. The room will be cleaned later.

2. This parcel mustn't be opened until Christmas Day.

3. Tea can't be made with cold water.

4. A meeting will be held by the students before the Teacher's Day.

5. Tires can be recycled to make pipes or floor coverings.

6. Applications should be sent before December.

7. The contract must be signed by the manager today.

8. The new bridge will be built by the end of the year.

9. Cloth bags should be used instead of plastic bags

10. The garbage can be used to make fertilizer.