64. What does the author think of cities all over the world? (A). They are alive. (B). They are hopeless. (C). They are similar. (D). They are different.

60.What information coa we get from the first passage? (A).tis the iet stoomn that affeets how fast airplanes fly. (B).Planes go slower when they are moving with the wind. (C).It takes more time to fly from NY to London than from London to NY. (D).The jet stream always blows from the east to the west across the Atantic.