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Unit 1 Lead-in

1 human beings 2 powered 3 greenhouse 4 far away 5 make a difference 6 breathe in 7 decreasing performance 8 four inches high 9 campaign 10 encourage Ex 3

1 B 2 B 3 C 4 A 5 D Ex 4

issues, pollution, deforestation, related, consumption, resources, threat, responsibility Ex 5

1 addicted—smoking 2 environment—concern 3 expert—wisdom

4 possession—greed 5 resources—inexhaustible Ex.6

1 strategies 2 specific 3 consumers 4 released 5 trapped 6 consequence 7 was isolated 8 priority 9 convenience 10 elements Ex7

1 transform 2 all the way 3 sit back 4 resulting from 5 share…with

Ex.8

1 How did the war, which brought terrible disasters to mankind, impact on such a poet?

2 Mothers are sometimes blind to the faults of their beloved children, which will cause the children to make the same mistake again.

3 As a new immigrant in this completely strange country, she always felt isolated.

4 Acting before thinking often results in failure, so we should think before we leap.

5 The time for talking is past; we must take positive action to protect our environment. Ex.9

1 Take two pills each time and three times a day and you will be well in a few days.

2 He is not impatient; he is just too tired.

3 Once water shortage reaches the point of no return, there will be nothing left to be done but abandon the city.

4 We’d like to share our experience in city planning with every representative here and show them what is special of our innovations.

5 We can’t just sit back and do nothing about increasingly serious traffic problems. Ex 12

1 D 2 A 3 C 4 A 5 B Ex. 13

1 subtle 2 were overtaken 3 species 4 decades 5 boundaries 6 audio 7 directly 8 focus 9 tone 10 cupped Ex. 14

1 at that rate 2 For the sake of 3 come to 4 by hand 5 vice versa Ex. 15

1 Young people sometimes complain of not being able to communicate with their parents.

2 Mary has been longing to take up residence in a Chinese village in Yunnan for a few years. Now her dream has come true.

3 Domestic animals are used to depending on humans, so it is difficult for them to survive in the wild.

4 He was suddenly overtaken by a fear that he would be laid off the company because of depression.