My brother is really___ . He often works in his office far into the night. [ ]

The population of Africa is ________ so rapidly as to cause concern of the whole world.

I want to have ______ English pen pal.

You can not imagine the difficulty they had ____ the problem It isn’t ____ easy [ ]

依次填入下面横线处的词语，恰当的一组是（ ）①我们的工作计划已经呈报上级有关部门，待________之后，即可付诸实施。②台湾名导李安耗巨资拍摄的电影《色·戒》竞然________鼓吹冷酷汉奸的人性亲情，真叫人难以接受。③这家医药公司________世界医药行业之首，是因为有三项产品连续获得国际金奖。