1. Plants (make, makes) our surroundings beautiful.

2. They (give gives ) us clean and fresh air. 3. Washing our hands regularly (prevent, prevents ) us to get sick.

4. Therefore, let us (make, makes ) a habit to wash our hands regularly with soap and water.

5. Water is very important to our body. We must (drink, drinks) 6-8 glasses a day.

6. The doctors always (do, does) their job well to save patients.

7. They (need, needs ) our support and understanding.

8. All planets( belong, belongs ) to the solar system but there are great differences between them.