IV Choose the best answer (A, B, C or D). 1. ………….. loss can be caused by noise pollution. A. sound B. hearing C. listening D. audio 2. Ships spill oil in oceans and rivers. This leads ………….. the death of many aquatic animals and plants. A. to B. in C. from D. at 3. Households pollute water sources by ………….. waste into ponds, lakes, and rivers. A. damaging B. dumping C. losing D. leading 4. This month’s electricity bill is too high ………….. the air conditioner is turned on all the time. A. since B. due to C. although D. because of 5. The government has come ………….. a solution to the water problems of the city. A. up to B. up with C. to with D. on to 6. All the aquatic plants and animals will die if the factory ………….. dumping poison into the lake. A. will keep B. to keep C. kept D. keeps 7. A lot of fish has died recently because of the ………….. water in this lake. A. contaminating B. contaminated C. contaminate D. contaminant 8. If the air was clean, we ………….. have to wear masks when going out. A. wouldn’ B. won’t C. would D. will 9. If I ………….. you, I ………….. water from that dirty tap. A. am - will drink B. am - won’t drink C. were - would drink D. were - wouldn’t drink 10. If he ………….. trash around his garden, the garden would look very nice now. A. will throw B. would throw C. didn’t throw D. doesn’t throw V Put the verbs into the correct forms. 1. If people (be) ………………. fully aware of the dangers of air pollution, they (damage) ………………. the atmosphere this way. 2. If I (be) ………………. you, I (turn) ………………. the volume down for him to sleep. 3. We (not be) ………………. able to drink that water if it is not refined. 4. If you (reduce) ………………. the number of bulbs in your house, you (pay) ………………. less money for the electricity bill next month. 5. If many animals and plants die, it (unbalance) ………………. our ecosystem.