3/ Many accidents are caused by careless driving

4/ The river bank is covered by weeds

5/ English is spoken all over the world

6/This house isn't used very often

7/Is French taught in this school?

8/ A lot of beautiful toys are made from recycled plastic

9/ The streets are cleaned by the workers everyday

10/ Are concerts usually held at the university?

IV/

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 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