Passage 4
How often one hears children wishing they were grown-up, and old people wishing they were young again. Each age has its pleasures and its pains, and the happiest person is the one who enjoys what each age gives him without wasting his time in useless regrets.
Youth is a time when there are few tasks to make life difficult, if a child has good parents, he is fed, looked after and loved whatever he may do. It is impossible that he will ever again in his life be given so much without having to do anything in return. In addition, life is always presenting new things to the children—things that have lost their interest for older people because they are too well-known. But a child has his pains: he is not so free to do what he wishes to do; he is continually being told not to do things, or being punished for what he has done wrong.
When the young man starts to earn his own living, he can no longer expect others to pay for his food, his clothes, and his room, but has to work if he wants to live comfortably. If he spends most of his time playing about in the way that he used to as a child, he will go hungry. And if he breaks the laws of society as he used to break the laws of his parents, he may go to prison. If, however, he works hard, keeps out of trouble and has good health, he can have the great happiness of building up for himself his own position in society.
People can experience happiness if they ______.
题干的意思是：人们能够经历幸福，如果他们______。通过第一段中的主题句我们可以得到答案，只有那些懂得享受人生的不同阶段带给他们的痛苦和欢乐，并且从不浪费时间在无用的后悔中的人才是最幸福的人。所以正确答案为B项。
When people were young, they used to ______。
题干的意思是：在童年，人们常常______。根据文章的第二段我们可以得知，童年因为有父母的照顾，衣食无忧，通常很少有事情使生活变得困难。所以用排除法可知正确答案为B项。
The pains of children lie in the fact that ______.
题干的意思是：孩子们的痛苦在于______。根据第二段中的最后一句话可以得知“he is not so free to do what he wishes to do...”孩子们的痛苦在于不能自由地去做他想做的事情。所以，正确答案为D项。
Children are usually happy because ______。
题干的意思是：孩子们通常很快乐是因为______。根据文章第二段的最后两句话来分析本题答案。最后一句话讲的是孩子的痛苦，并且句首有一个转折词but，由此可以判断前一句应该是讲孩子的快乐。所以正确答案为D项。
Which of the following is NOT needed for a young man to be happy?
题干的意思是：下列哪个选项对于一个想要得到快乐的年轻人不是必需的?根据文章的最后一句话我们可以得知A、B、D选项都是一个年轻人得到快乐所必需的。所以正确答案为C项。