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21. There is an old saying, ______________. Its the experience of our forefathers, however, it is correct in many cases ever today. 22. The English proverb says, ______________. This is quite true because ______________. 23. ______________ is now______________, and at the same time ______________. These two factors have caused ______________. Then what shall we do to solve ______________ in the face of such a situation. 24. One of our ancient philosophers said, ______________. Chinese people have always been holding this idea to be one of their standards of morality. 25. One of the great early writers said that ______________. If this is true, the present situation should make us ponder over ______________. 26. Why do ______________? Many people often ask questions like this. 27. In recent years, there is a general tendency to ______________. According to a study, there is ______________. compared with ______________ last year. Why ______________? 28. According to a survey, there is a growing number of ______________. What brings this result? The main reason rests with. 29. Some people prefer to ______________. In their opinion, ______________. In addition, ______________. Nevertheless, nowadays, ______________ has become more and more common. | 
