帮我做一下英语好吗?三.完形填空. The population problem may be the___one of

帮我做一下英语好吗?
三.完形填空.
The population problem may be the___one of the world today.The world's population is growing___.Every day,many babies are born around the world.Two thousand years abo,there were only 250million people___the world.Four hundered years abo,the number was __500 million.But at the beginning of the ___century,the world's population will __six billion by the end of the 20th century.This is just ten__after it __five million.People say that by the year 2010,__may be seven billion.Maybe,hundreds of years later,most part of the land will be covered with people.
( )1.A.great B.greater C.greatest D.greating
( )2.A.faster and faster B.fast and fast C.fastest and fastest D..faster and fast
( )3.A.in B.on C.at D.for
( )4.A.nearly B.more C.less D.over
( )5.A.twenty B.twenty-first C.twentieth D.twelfth
( )6.A.novel B.report C.story D.message
( )7.A.past B.pass c.passed D.passes
( )8.A.weeks B.months C.seasons D.years
( )9.A.arrived B.got c.reached D.reached for
( )10.A.this B.its c.one D.it
四.补全对话.
A:Good morning,granny.
B:Good morning.
A:You look pale.(1)___________?
B:oh,boy.I can't stand the environment here.
A:(2)______________?
B:The chemical factory produces terrible gas. The bad air makes my chest hurt.And it's difficult for me to breahte.
A:The large popolation has caused many problem.(3)___________?
B:I've been like this since last month.
A:(4)___________?
B:yes,I have been to the hospital several times.
A:(5)__________.Bye!
B:Bye!
晕，怎么每个人的答案都不一样呀，谁能告诉我哪个才是最好的呀！

1D 2A 3A 4D 5B 6B 7B 8D 9C 10D
1what's wrong with you
2how is the environment
3when did you feel uncomfortable
4Have you been to the hospital;
5 take care of yourself