Passage 3
What will man be like in the future—in 5,000 or even 50,000 years from now? We can only make a guess, of course, but we can be sure that he will be different from what he is today. For man is slowly changing all the time.
Let us take an obvious example. Man, even five hundred years ago, was shorter than he is today. Now, on average, men are about three inches taller. Five hundred years is a relatively short period of time, so we may assume that man will continue to grow taller.
Again, in the modern world we use our brains a great deal. Even so, we still make use of only about 20% of the brain's capacity. As time goes on, however, we shall have to use our brains more and more, and eventually we shall need larger ones. This is likely to bring about a physical change tool—the head, in particular the forehead, will grow larger.
Nowadays our eyes are in constant use. In fact, we use them so much that very often they become weaker and we have to wear glasses. But over very long period of time it is likely that man's eyes will grow stronger.
On the other hand, we tend to make less use of our arms and legs. These, as a result, are likely to grow weaker. At the same time, however, our fingers will grow more sensitive because they are used a great deal in modern life.
But what about hair? It will probably disappear from the body altogether in course of time because it does not serve a useful purpose any longer. In the future, then, both sexes are likely to be bald.
Perhaps all this gives the impression that future man will not be a very attractive creature to look at. This may well be true. All the same, in spite of all these changes, future man will still have a lot in common with us. He will still be a human being, with thoughts and emotions similar to our own.
The passage tells us about ______.
题干的意思是：这篇文章讲述了______。本文开门见山地点出了文章的主题，所以从第一段我们可知，B项为正确选项。
There is evidence that man is changing, ______.
题干的意思是：有证据表明人类在不断变化，______。第二段以举例的方式表明在过去的500年人类的身高已经发生变化，B、C、D在文中都曾涉及，但只是一种猜测，并非证据。只有A项结果是得到证明的，所以，选A。
Man's forehead will grow larger because ______.
题干的意思是：人类的前额将会变大，因为______。本篇文章的结构非常清晰，每一段的第一句为主题句，所以应在第三段中找寻此题答案。最后一句话中“this”指代前句，前句与D项对应。所以，选D。
Future man will probably ______.
题干的意思是：将来人类会______。根据答案可知此题考查的是人类眼睛的发展。根据第四段可知，日前人们用眼过度所以导致视力下降，但从长远来看人的视力是会变强的。所以，选C项。
The reason for believing that future man will be different is that he ______.
题干的意思是：人们相信将来的人类将会不同的原因是______。根据第一段最后一句话，“for”为原因，所以选B。