I;1-B,2-C,3-B,4-D,5-A,6-C,7-B,8-B,9-D,10-C

II;1-C;2-D;3-D;4-B;5-C;6-B;7-A;8-C;9-D;10-D

  II. Choose the word which has a different stress pattern from the others. 

1.A.traffic B.dancer C.cycling D.balloon

2.A.central B.gripping C.complete D.boring

3.A.obey B.enter C.answer D.listen

4.A.station B.healthy C.safety D.alone

5.A.tidy B.compete C.extend D.mistake

6.A.dangerous B.plentiful C.another D.limited

7.A.easily B.consumption C.energy D.negative

8.A.different B.expensive C.abundant D.convenient

9.A.attention B.holiday C.pollution D.effective

10.A. medical​ B. national​ C. chemical​ D. historical

  III. Choose the best answer

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. of

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 _________ 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 were clean, we __________ have to wear masks when going out 

A. wouldn’t 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 people _________ trash around the garden in the park, the gardent would look very nice now 

A. will throw B. would throw C. didn’t throw D. doesn’t throw