1. We can only guess, of course, but we can be sure that he will be different from what he          is today.（Para. 1, L. 2～3） 

注意句中what he is today “今天的样子”，名词性从句作from的宾语。he指man，            即 “人类”。又如:

Man, even five hundred years ago, was shorter than he is today.（Para. 2, L. 1～2）

当然，我们只能预测，但是可以肯定的是他们一定会和今天有所不同。

2. Even so, we still make use of only about 20％ of the brain’s capacity.（Para. 3, L. 1～         2）

句中so指前一句话we use our brains a great deal in the modern world 这一事实。

既便如此，我们也只用了大脑容量的20％。

3. In fact, we use them so much that very often they become weaker and we have to wear         glasses.（Para. 4, L. 1～2）

 句中so...that 引导了一个结果状语从句。又如:

 He got up so early that he caught the first bus. 他起得很早，所以赶上了早班车。

 When the football fans saw Beckham, they got so excited that they cried out.

  球迷们看到贝克汉姆兴奋地大叫起来。

   事实上，由于频繁的使用使人类的视力越变越弱，并最终不得不佩戴眼镜。

4. Perhaps all this gives the impression that future man will not be a very attractive creature        to look at.（Para. 7, L. 1～2）

句中that引导了一个同位语从句，修饰impression。从句中to look at作后置定语，修       饰creature，注意句末介词at是不能省略的。

   某些动词（短语）后需加上适当的介词，才能使句子结构正确，语意完整。又如:

   It’s too small a room for us to live in.

   But some Internet users want more than just someone to chat with.