PASSIVE VOICE

The lost climbers ___ (save) by a rescue team yesterday.

• are saved

• were saved

Last summer, the lake near our city ___ (pollute) because of an accident in a factory.

• is polluted

• was polluted

What time___ breakfast ___ (serve) in this hotel?

• is ... served

• was ... served

Tons of waste ___ (pump into) rivers by factories every day.

• is pumped into

• was pumped into

We should take measures to protect coral reefs.

Measures to protect coral reefs___

The local authorities will build a shelter for the homeless.

A shelter for the homeless ___ by the local authorities.

The students in Class C5 are going to do an experiment tomorrow.

An experiment ___ by the students in Class C5 tomorrow.

Oil spills have killed a large number of birds since last July.

A large number of birds ___ by oil spills since last July.

Tracy will paint the kitchen.

The kitchen ___ by Tracy.

Ron has to tidy the house.

The house ___ by Ron.