II. Choose the correct answers A, B, C, or D to finish the sentences.

1.  If you press the button, what ____________?

      A.  would happen           B.  happens                          C. will happen                      D. happen

2. If I ____________ time, I ____________ you with planting that tree.

      A.  had - helped             B.  will have – will help       C. have – will help               D. have – don’t help

3. We can reuse things like____________.

      A. envelopes                  B. plastic bottles                  C. cloth bags                        D. glasses

4. People throw away millions of____________ every year.

      A. old car tires               B. drink cans                        C. old newspapers                D. household wastes

5. Will you____________ please?

      A. open the garbage can                                             B. hang the clothes             

      C. empty the dustbin                                                   D. collect the bottles

6. Billions of____________ are thrown away every year all over the world.

      A. cans                           B. bottles                              C. cups                                 D. glasses

7. Things like____________ can be reused.

      A. plastic bags               B. fabrics                              C. paper toys                        D. envelopes

8. We can recycle old, clothes and make them into____________.

      A. compost                     B. leather                              C. shopping bags                 D. jogging shoes

9. If you go out with your friends tonight, I ____________ the film on TV.

      A.  watch                       B.  watched                          C. am watching                    D. will watch

10. If she ____________, we will miss the bus.

      A. not hurries                 B. doesn’t hurry                   C. won’t hurry                     D. don’t hurry

11.  I __________ to London if I don’t get a cheap flight.

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

12. Don't throw that old____________ away. We can decorate it to make a flower vase.

      A. can                             B. glass                                C. bottle                               D. paper

13. I think you should____________ to save water.

      A. have a bath                B. go swimming                   C. heat water                        D. have a shower

14. We should____________ to prevent pollution.

      A. use reusable bags      B. plant more trees               C. turn off the lights             D. save electricity

15. We will buy____________ for our class

      A. water bottles              B. recycling bins                  C. energy-saving lights        D. refillable pencils

16. If we plant more trees in the schoolyard, the school will become a ____________ place.

      A. darker                        B. dirtier                               C. greener                             D. more polluted

17. If we all use ____________ bags, we will help the environment.

      A. new                           B. cheap                               C. reusable                           D. reduced

18. Plastics, glasses and chemicals underground are harmful ____________ plants and animals.

      A. to                               B. of                                     C. in                                     D. at

19. These three Rs ____________ reduce, reuse, and recycle.

      A. stand up                     B. stand for                          C. ask for                             D. means

20. Because plastics bags are very hard to ____________, they will cause pollution.

      A. dissolve                     B. wrap                                C. tear                                  D. collect
(Đáp án + Giải thích đáp án)