Find the mistake.

My (A) uncle is one of the best (B) environmentalist (C) in (D) my country.

Choose the correct answer.

The Friends of the Beach is organizing a campaign to clean _______ the Front Beach.

If we _______ more trees, it will help reduce air pollution.

Choose the correct answer.

We should take a bus often _______ we can help reduce air pollution in the city.

Choose the correct answer.

We should clean up the beach _______ we should plant more trees along the coast.

Choose the correct answer.

People are using more and more _______-friendly products.

Find the mistake.

If you don’t pay (A) attention, you will (B) understand (C) the lesson (D).

Find the mistake.

It is (A) too (B) hot today – please turn on (C) the air condition (D).