Question 5. If people didn’t ………rubbish in the street, it would look attractive.

A.throw         B.threw             C.throwing                 D.thro

Question 6. If we recycle more, we ……….the Earth.

A.help                   B.will help                   C.helping                     D. helped 

Question 7. ……water is one of the factors that have driven many species to the verge of extinction

A.Contaminating       B.Contaminate    C.Contamination      D.Contaminated             

Question 8 They get sick so often. If they  …… more, they ………healthier.

A.exercise/ will be                               B.exercised/ would be       

C.would exercise/ are                          D.exercise/ would are

Question 9.We will save thousands of trees if we ………… paper 

A.not waste         B.doesn't waste           C.don't waste             D.won't waste         

Question 10. Vy had a stomachache ................... she ate a big dinner.

A.although            B.because of                C.due to                D.since 

II.Write the correct form of each verb in brackets

1. If it (be) …………… sunny next week, we (plant) ……………… the vegetables.

2. If we (recycle) …………… more, we (help) ………………… our Earth.

3. We (save) …………… a lot of trees if we (not waste) …………… so much water.

4. More people (have) ……………… fresh water if we only (use) ……………… the water we need.

5. If the river (not be) ……………… dirty, there (be) ……………… more fish.

6. If the Earth (be) …………… warmer, the sea level (rise) ……………

7. If the sea level (rise) ……………, some countries (disappear) ………………

8. If we (reduce) ……………… soil pollution, we (have) ……………… enough food to eat.

9. If we (not have) ………………. Enough food, we (be) ……………… hungry.

10. If we (be) ………………… hungry, we (be) ………………… tired.

Question 6. The more waste paper we recycle, ………

     A. the least trees we preserve                                      B. the most trees we preserve

     C. the best trees we preserve                                       D. the more trees we preserve

Question 7. Many people, including me, like the slow…… of life in the countryside.

     A. space                           B. speed                                C. step                                  D. pace

Question 8. My friend's uncle felt…. when he failed the driving test the second time.

     A. anxious                       B. determined                      C. discouraged                    D. annoyed

Question 9. The government……. the flood victims with food, clothes and medicine.

     A. carried                        B. gave                                  C. provided                          D. offered

Question 10. As long as they….. for more than three days, they can sleep at my flat.

     A. haven't stayed            B. wouldn't stay                   C. don't stay                         D. aren't staying

Question III. Put the verbs in brackets into the correct form.

1.If we (recycle) ________ more, we will help the Earth.

2. Factories (not dump) ______________waste into rivers if the government fines them heavily.

3. If people travel to work by bus, there (be) ______________fewer car fumes.

4. We (save) ________________thousands of trees if we don’t waste paper.

5. If we use water carefully, more people (have) ______________fresh water.

6. If the factory (continue) ________________ dumping poison into the lake, all the fish and other aquatic animals will die.

7.If we recycle more, we (help) ________________ the Earth.

8. If people (travel)________________to work by bus, there will be fewer car fumes.

9. We will save thousands of trees if we (not waste) _______________ paper.

10. Factories won’t dump waste into rivers if the government (fine) _______________ them heavily.

11. Our teacher (tell) _______________ us yesterday that he (visit) _______________ England in 1970.

12. Alan (have) _______hardly (prepare) ________for dinner when her husband (go) _______home

13. No sooner (have) ___________I (watch) _______TV than the phone (ring) __________

14. Before I (watch) __________ TV, I (do) _____________my homework.

15. After I (wash) _____________my clothes, I (sleep) _______________