完形填空：
Suppose every person on earth ate only one kind of food. And in one year that food disappeared. 1 that happened, all humans would soon disappear, too.
Luckily, humans 2 face the problem. However, another creature (生物) may. The animal is the giant panda, one of the world’s most 3 animals.
It has been discovered that the bamboo plants the giant pandas eat are dying. As a result, many of the pandas are dying of 4 . In the wild, the giant panda eats only two kinds of bamboo plants. One is the umbrella bamboo; 5 is the fountain bamboo. 6 kinds can live 100 years. In its 7 year the bamboo plant blooms, has seeds and dies.
Last year the umbrella and the fountain 8 9 grow in China became 100 years old. The plant grows from seeds formed in the late 1870’s. Now almost all of these bamboo plants are dead. Young shoots now grow from the seeds. However, it will be many months before the shoots are large enough to be eaten as food by the pandas. So the large black and white animals continue 10 .
Can the wild pandas be 11 ? A group of American scientists went to China 12 the pandas in their native habitat. The studies tool place in the areas of Sichuan Province in south-west China. The scientists especially wanted to find out 13 about the animals’ food. They wanted to see 14 the pandas are able to change to other foods 15 the two kinds of bamboo are growing.
The Chinese government recognizes the worldwide concern about the giant pandas and 16 steps to save the animals. Large areas of the giant pandas habitat have been set 17 as wildlife preserves 18 the pandas can live freely. At the same time, Chinese scientists are trying to increase 19 number of giant pandas 20 some of the animals in zoos. The first baby panda was born in Beijing Zoo in the autumn of 1978.
1．A．Unless B．Since C．If D．Because
2．A．don’t B．haven’t C．do D．would
3．A．liking B．lovely C．to be loved D．love
4．A．hunger B．heat C．hungry D．cold
5．A．another B．the second C．other D．the other
6．A．All B．Both C．Some D．Either
7．A．one hundred B．hundredth C．hundreds D．hundred
8．A．kinds B．ones C．bamboo D．plants
9．A．that B．those C．when D．where
10．A．to grow B．to die C．becoming weak D．to be dead
11．A．saved B．saving C．dead D．dying
12．A．to search B．to find C．to study D．to do search
13．A．something B．more C．anything D．many more
14．A．why B．if C．how D．when
15．A．if B．and C．while D．for
16．A．took B．make C．has taken D．go
17．A．aside B．against C．about D．in
18．A．where B．there C．and D．which
19．A．the B．a C．a large D．a small
20．A．to raise B．by raising C．to keep D．keeping
答案与提示：
1．C
表示假设。本小题易误选D项，但是这句话讲的并不是一个事实，而是虚拟的假设，因此正确答案应为C项。
2．A
人类并没有面临这类问题。本小题也易误选D项，这主要是由两方面的原因所致：一是读题不够认真，文中的Luckily本身就表明人类现在并不面临这一问题；二是没有注意到该句叙述的是一个一般事实，因此要用一般现在时态。
3．B
名词前应被形容词修饰，而此题只有lovely为形容词，故选B。
4．A
根据上下文，应为死于“饥饿”，C项hungry为形容词，故选名词hunger。
5．D
表示“两个之中的另一个”，是one…the other结构。
6．B
很明显是指上文提到的两种竹子。
7．B
句意为：在第一百年的时候，竹子开花结果然后死亡。“第一百”应用序数词。
8．C 指伞竹和喷泉竹。
9．A
关系代词。本小题应选A项，而不能选其他项，因为这里需要一个关系代词作主语引导定语从句(that grow in China)。
10．B
没有这两种竹子作为食物，熊猫继续死亡。本小题的误选是由于没有正确把握上文所提供的语料信息，——竹笋需要好几个月才能长大供熊猫吃，因此熊猫的食物自然是个问题，所以答案不可能是A项或C项。再则，熊猫的不断死亡这一类情况属于动作，而不属于状态，因此D项亦应予以排除。
11．A 用被动语态表示“被拯救”。
12．C
这里用study表示“研究”大熊猫；搜寻大熊猫为search for the pandas, 这里不属此句型，故A应排除。
13．B 发现关于大熊猫食物的更多的情况。
14．B if在这里表示“是否”之意，相当于whether，引导宾语从句。
15．C 他们想看一下在这两种竹子正在生长的时候，大熊猫是否能够吃别的食物来代替。
16．C
“已经采取措施”，用现在完成时。选C项是因为take steps表示“采取措施”，其他选项均不能与steps搭配，构成动宾关系。
17．A set aside表示“留下将来使用”之意。
18．A 先行词表示地点，where引导一个限制性定语从句修饰先行词wildlife preserves。
19．A 句意为“提高大熊猫的数量”，故用定冠词the 来修饰number。
20．B 选by raising表示“通过……”。
