完型填空201321.Man can not go on increasing his number at the pr

完型填空2013
21.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.1.A：for B：easy C：Some D：number E：next 2.A：for B：easy C：Some D：number E：next 3.A：for B：easy C：Some D：number E：next 4.A：for B：easy C：Some D：number E：next 5.A：for B：easy C：Some D：number E：next