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