现存TCP/IP邮件系统的扩展协议是()。

In the future, more ______ should be placed on the education of the young.

Only a(n) ________ few were invited to the dancing party.

认识到目标与当前状态之间存在的差异，想出某种办法来减小这个差异的方法是（）

Construction of the railways helped to develop the national _______ of Tanzania and Zambia.

研究表明，亲生父母社会经济地位低的儿童，一旦被社会经济地位高的养父母收养，与生活在原来家庭环境中相比，IQ分数会明显地增加，这说明了()

网络适配器也称为()。

Take it ______. It is nothing but a joke.

新行为主义心理学的代表人物是（）

I'm ______ to graduate in the next half of the year.