根据短文内容，从短文后的七个选项中选出能填入空白处的最佳选项，选项中有两项为多余选项。
Brain Drain
Imagine you are sitting in your living room and out of surprise you get a call from a friend．He tells you that he's gotten the student visa and is going to study abroad for higher education．His parents may feel it a privilege that their son is guaranteed to have a bright future and unbelievable job opportunities．【小题1】While many people believe that immigration is a personal choice that must be understood and respected, others have realized a serious problem-brain drain．Brain drain refers to the flow of highly skilled and educated people, such as doctors, engineers, scientists from less developed countries to developed countries． Brain drain has bee a mon social problem．【小题2】 These reasons are Push factors （因素） and Pull factors．The push factors include low wages and lack of satisfactory working and living conditions, and so on．The pull factors, however, include higher pay and better working conditions, better job opportunities, as well as better research equipment．
As we can see, many educated people are heading for richer countries, seeking higher wages and better working conditions．【小题3】 It reduces the number of creative people who can contribute to the development of their country．Meanwhile, with more successful businessmen taking their money abroad, their countries are missing an opportunity of wealth creation．【小题4】 Besides these economic effects, the brain drain has also social negative effects, such as the loss of improvement in research and technique．
Therefore, measures must be taken in less developed countries to avoid brain drain． 【小题5】 Social developments like health services and education opportunities also need improving．Otherwise, less developed countries will face an uncertain future．A．Even you may start to admire his plans．B．This also reduces government tax ine．C．Why should their motivations be seriously considered?D．This of course has serious negative effects on their own countries．E．There should be more job opportunities for highly educated people．
F．So it is important to find out the proper reasons behind the brain drain．
G．Most of the measures taken so far have not reduced the effects of brain drain．A
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(答案→)A
解析：文章介绍现在的人才流失的现象非常严重，分析这个现象存在的原因，它的危害和解决的方法。
【小题1】考查句意理解和上下文串联：根据上文：His parents may feel it a privilege that their son is guaranteed to have a bright future and unbelievable job opportunities．可知：甚至你可能会羡慕他的计划，答案是A
【小题2】考查句意理解和上下文串联：根据下文：These reasons are Push factors （因素） and Pull factors．可知：所以要找到人才流失背后的原因很重要，答案是F
【小题3】考查句意理解和上下文串联：根据下文：It reduces the number of creative people who can contribute to the development of their country．可知：这对他们自己的国家一定会有负面的影响，答案是D
【小题4】考查句意理解和上下文串联：根据上文：Meanwhile, with more successful businessmen taking their money abroad, their countries are missing an opportunity of wealth creation．可知：这也减少的政府的财政收入，答案是B
【小题5】考查句意理解和上下文串联：根据上文：Therefore, measures must be taken in less developed countries to avoid brain drain．可知：应该有一些就业机会给受过高等教育的人，答案是E