_______ trees have been planted near here, so the air is very fresh.

Eating fruit and vegetables can help you ______ more vitamins.

Some people are afraid that ______ air pollution may cause changes in weather around the world.

As a matter of fact, work provides us much ________ just salary and income; it also helps us realize our dreams and makes us feel confident.

In your class, you should allow students to voice their opinions, they are different from your own