1、Unit 1Lead-in 1 human beings 2 powered 3 greenhouse 4 far away5 make a difference 6 breathe in 7 decreasing performance 8 four inches high 9 campaign 10 encourageEx 3 1 B 2 B 3 C 4 A 5 D Ex 4 issues, pollution, deforestation, related, consumption, resources, threat,
3、orm 2 all the way 3 sit back 4 resulting from 5 share…withEx.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 a
4、gain. 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 pill
5、s 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 w
6、ith 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 decades5 boundaries 6 audio
7、 7 directly 8 focus 9 tone 10 cuppedEx. 14 1 at that rate 2 For the sake of 3 come to4 by hand 5 vice versaEx. 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 Chine
