A very important world problem-in fact, I am inclined to say it is the most important of all the great world problems________(1) _________-is the rapidly increasing pressure of population on land and on land resources.

　　This enormous increase of population will create immense problems. By 2000 A.D., unless something desperate happens, there will be as many as 7,000,000,000 people on the surface of the earth! So this is a problem which you are going to see in your lifetime

　　Why is this enormous increase in population taking place? It is really due to the spread of the knowledge and the practice of _________ (2)_______. You have heard of Birth Control? Death Control is something rather different. Death Control recognizes the work of the doctors and the nurses and the hospitals and the health services in keeping alive people who, _____(3)_____, would have died of some of the incredibly serious killing diseases , as they used to do. Squalid conditions, which we can remedy by an improved standard of living, caused a lot of disease and dirt. Medical examinations at school catch diseases early and ensure healthier school children. Scientists are at work stamping out malaria and other more deadly diseases. If you are seriously ill there is an ambulance to take you to a modern hospital. Medical care helps _____(4)______. We used to think seventy was a good age; now eighty, ninety, it may be, are coming to be recognized as a normal age for human beings. People are living longer because of this Death Control, and _____(5)_____, so the population of the world is shooting up.

　　A fewer children are dying

　　B a few years ago

　　C what is coming to be called Death Control

　　D which face us at the present time

　　E making it possible for people to live longer

　　F to keep people alive longer

　　参考答案: D、C、B、F、A

　　答案解析：

　　1. 我们看到空白处前面的句子“I am inclined to say it is the most important of all the great world problems”是个完整的句子，最后一个单词是名词，所以这很容易让我们想到空白处应该是从句，只有C和D选项符合。我们再看，problems是复数，所以从句中的谓语动词应该是动词原形或过去式，所以排除C（what is coming）所以答案选择D。

　　2. 空白处前面的单词是of（介词），所以后面需要填的是名词，名词性短语或从句，答案在C和E中选择。空白处后面紧接着出现了Birth Control和Death Control，这与C中的关键词相呼应，所以答案选择C.

　　3. 此处需要填写的是一个插入语，因为空白处前面正好组成完整的句子，在一个选项中，只有B可以作为插入语，所以答案选择B.

　　4. Help (sb.) to do sth. 帮助做某事，答案选择F.

　　5. And是连词，表示前面部分是并列关系，and前面是完整的句子，那么and后面也应该选择完整的句子，答案只能是A.