I. Choose the best answer A, B, C or D to complete the sentences.

1. What are you going to do …………………. Sunday morning?

A. in                     B. on                    C. on the              D. in the

2. Unless we ……………….. cutting down trees, we can’t prevent floods and other natural disasters.

A. will stop          B. don’t stop        C. stop                 D. won’t stop

3. The Nile River is the ………………… river in the world.

A. high                 B. longest             C. most long                  D. longer

4. Thuy is thirsty. She likes some ……………….

A. bread               B. rice                   C. vegetables        D. orange juice

5. I ……………….. Tom and Jerry many times.

A. see                             B. saw                  C. am seeing         D. have seen

6. As it doesn’t rain so I have to ……………….. the flowers in my garden everyday.

A. water               B. watering           C. watered            D. waters

7. We postponed our journey to the beach ……………….. it rained.

A. and                  B. but                             C. or                     D. because

8. If we cut down more forests, there …………….. more floods.

A. are                             B. were                 C. have been         D. will be

9. We should go to school by bike to ………………. energy.

A. save                 B. protect             C. pollute             D. spray

10. My sister ………………. at home yesterday.

A. am                             B. is                      C. was                  D. were