Modern zoos are very different from zoos built fifty years ago. At that time, zoos were places (1)people could see animals from many parts of the world. The animals lived in (2) with iron bars. The cages were easy to keep clean. (3), for the animals, the cages were small and impossible to hide in. Although the zoo (4) took good care of them, many of the (5) did not feel fortable, and they often became (6).
In modern zoos, people can see animals in more (7) conditions. The animals are given more freedom in larger places (8) they can live more freely as they would in (9). Even the appearance of zoos has changed. Trees and grass grow in the cages, and water flows (10) the places that the animals live in. There are few bars, (11) there is often a deep ditch(沟), filled with (12), which surrounds a space where several (13) of animals live together as
they would naturally. In an American zoo, the visitor can walk (14) a huge special cage that is filled with trees, some small animals and many birds. And it is large enough for all the birds to live (15).In a zoo in New York, because of special night (16), people can observe certain animals that are (17) only at night when most zoos are closed. Some zoos have special places for visitors to (18) animals that live in the desert or underwater. Some other zoos have special places for animals that live in cold conditions like the (19) from the Arctic.
Modern zoos not only show animals for visitors, but also (20) and save rare animals. For this reason, fifty years from now, the grand children of today’s can still be able to enjoy watching these animals.
1.A.that B. where C. which D. there
2.A.houses B. rooms C. cages D. offices
3.A.Therefore B. however C. So D. Though
4.A.masters B. managers C. keepers D. trainers
5.A.workers B. animals C. bears D. animals
6.A.excited B. angry C. ill D. frightened
7.A.natural B. difficult C. warm D. different
8.A.so that B. and C. but D. or
9.A.forest B. nature C. rivers D. the water
10.A.in B. by C. near D. through
11.A.instead B. instead of C. and D. or
12.A.stones B. earth C. oil D. water
13.A.sorts B. families C. classes D. groups
14.A.by B. out C. through D. in
15.A.happily B. naturally C. deeply D. hardly
16.A.moon B. sign C. light D. signal
17.A.live B. active C. living D. sleeping
18.A.feel B. touch C. watch D. talk to
19.A.snakes B. monkeys C. bears D. tigers
20.A.buy B. keep C. sell D. catch1-5BCBCB 6-10CAABD 11-15ADACB 16-20CBCCB
网友回答
(答案→)1-5BCBCB 6-10CAABD 11-15ADACB 16-20CBCCB
解析：
1. 选B。从结构上看，本空应用一个关系副词，引导一个定语从句。
2. 选C。从本空的后一句看，我们知道动物们住在笼子里。
3. 选B。这里用however表示对比或比较的关系。
4. 选C。动物园的动物当然是由zoo keepers进行管理的。
5. 选B。由于被关在笼子里，动物们当然就感觉不舒服了。
6. 选C。由于缺少运动，笼子里的动物自然地变容易生病。
7. A 从后文我们知道，由于动物们居住条件的改善，它们能够在更为广阔的空间中生活，人们在观赏这些动物时所处的环境也就更加地自然了。
8. A 从文章的逻辑来看，给予动物们更宽敞的空间主要的目的还是想让这些动物产能够象在自然的环境中那样。
9. B 根据常识可推知。
10. D through常用来表示从某个地方穿过。
11. A instead在这里表示新旧两种动物园的情况对比。
12. D 沟里有水，以使环境更加自然。
13. A 在自然的环境里，当然是各类动物都可以在同一个地方生活。
14. C 这里所提到的cage是一种特制的大型的笼子。
15. B 由于这种笼子特别大，因而各种鸟都可以自然地生活在这里。
16. C special night light指的就是红外线。借助这种光线，人们可以在晚上看清暗处的物品。
17. B 动物们大多数象人一样，在晚上休息。但部分动物却在晚上才活跃起来。人们到这个动物园当然是看这些动物们处于活跃状态下的一招一式。
18. C 对于动物，通常观众只能是看(watch)。
19. C 在所给选项中，在极地出现的动物只有bear。
20. B 从上下文我们知道，现代的动物园不仅仅是向观众们展示动物，而且还保护动物。