Man can not go on increasing his number at the present rate. In the （ 1 ） 30 years man will face a period of crisis.__（ 2 ）__ experts believe that there will be a widespread food shortage.Other experts think this is too pessimistic, and that man can prevent things from getting worse than they are now. But remember that two thirds of the people in the world are under-nourished（有营养的）or starving now.
One thing that man can do is to limit the （ 3 ） of babies born. The need （ 4 ） this is obvious, but it is not （ 5 ） to achieve. People have to be persuaded to limit their families.
5. ____

[单选题]Man can not go on increasing his number at the present rate. In the （ 1 ） 3

[单选题]Man can not go on increasing his number at the present rate. In the （ 1 ） 3

[单选题]Man can not go on increasing his number at the present rate. In the （ 1 ） 3

[单选题]Man can not go on increasing his number at the present rate. In the （ 1 ） 3

[单选题]Why can’t the man concentrate on his study?A． He keeps thinking of going to the movies. B. His classmates are taking a break.C． He’s been studying for too long.

[单选题]Why can't the man go traveling？A．He can't afford it. B.He doesn't like to fly. C.He has to work.

The old man，________ abroad for twenty years，is on the way back to his motherlan

[名词解释] go to man

[单选题]Only sharp _____ can enable man to be just right and good in his conduct, a

In the past two years the young man has made great progress and now he can work