46. There are sixty m__________ in an hour.

45. No one __________ (know) when he will be back.

B) 根据句意和首字母提示填词。

44. I think Beijing is one of the ___________ (beautiful) places in the world.　

43. The grand piano takes up too much __________ (room).

42. The government should pay much attention to the __________ (increase) population.

A) 用括号内所给单词的适当形式填空。

41. It usually takes me half an hour __________ (walk) to school.　

It seems that the cities in the future will have to change. Because the world’s population

16　 , there will be 　　17　 　people in the cities tomorrow.

It may be　 　18　 　for any family to live in a house with land around it. There 　　19　　 enough space for them.　 　　20　 　to solve this problem may be the skyscraper city(摩天城). The highest building in the world today is in Taipei. It’s about 509 metres high. The skyscraper cities in the future will be many times 　　21　 　.

In a skyscraper city about 250,000 people will live. Nearly a million people can 　　22　 in four of these great buildings. Each skyscraper city will have four towns in it and each town will have ten villages. They will live, work and　 　　23　　 　their free time in them. They won’t need to leave the city 　　24　 　they want to. They will be able to move about in the city by transport controlled 　　25　 　computers. Let’s imagine how the life will be then!

16.(　　 ) A. has grown　　　　 B. is growing　 　　 C. are growing　　　　　　　 　　 D. have grown

17.(　　 ) A. many　　　　 B. much　　　　 C. more　　　　 　　　　 D. larger

18.(　　 ) A. impossible　　 B. possible　　　 C. important　 　　　　　　 D. necessary

19.(　　 ) A. aren’t　　　 　 B. won’t be　 　　　 C. won’t have 　　　　　　 D. haven’t

20.(　　 ) A. A way　　　　 　　　 B. A road　　　　 C. An answer　 　　　　　　 D. An idea

21.(　　 ) A. lower　　　　 B. shorter　　　　 C. taller　　 　　　　　　 D. higher

22.(　　 ) A. live　　　　 　 B. study　　　　 C. work　　　　 　　　　　 D. be

23.(　　 ) A. spend　　　　 B. cost　　　　 　 C. pay　　　　 　　　　　 D. take

24.(　　 ) A. until　　　　 B. when　　　　 　 C. while　　　　 　　　　 D. unless

25.(　　 ) A. by　　　　　 　　　 B. at　 　　　　　 C. with　　　　 　　　　 D. in