新视野大学英语视听说教程(第二版)第三册答案(15)

Christmas tourism, and its winter tourism as winter is the best season in Santa's home town.

Unit 2 test

Part I

Keys: 1.C 2.C 3.B 4.C 5.D

Part II

(1)chemicals

(2)atmosphere

(3)particles

(4)trapped

(5)lasts

(6)human-based

(7)progressed

(8)Even in Ancient Rome people complained about smoke put into the atmosphere

(9)Air pollution can have serious consequences for the health of human beings

(10)Cities with large numbers of automobiles or those that use great quantities of coal often suffer most severely from air pollution problems

Part III

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