1.Recently, ______________ has become the focus of the society, and in this way.. People swarm to ______________.
2.______________ has been playing an increasingly important role in our day-to-day life. It has brought us a lot of benefits but created some serious problems as well.
3.Man is now facing a big problem-______________, which is becoming more and more serious. First, ______________ second, ______________.
4.Nowadays more and more people are beginning to be aware of the seriousness of ______________.
5.It is only during the last years that man has become generally aware that ______________.
6.There is an old saying, ______________. It's the experience of our forefathers, however, it is correct in many cases ever today.
7.The English proverb says, ______________. This is quite true because ______________.
8.______________ 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.
9.One of our ancient philosophers said, ______________. Chinese people have always been holding this idea to be one of their standards of morality.
10.One of the great early writers said that ______________. If this is true, the present situation should make us ponder over ______________.
11.According to the first graph, it can be seen that ______________, it can also be concluded from it that ______________.
12.There is an interesting and instructive picture which goes like this: ______________.
13.Nowadays there is a growing concern over ______________. Many people like ______________, while others are inclined to ______________.
14.Nowadays, it is common to ______________. Many people like ______________ because ______________. Besides, ______________.
15.______________, just like many other things, are preferred by ______________. While being attacked by the idea that ______________, some people consider ______________. They point that ______________.
16.Everything has two sides and ______________ is not an exception, it has both advantages and disadvantages.
17.For years ______________ had been viewed as ______________. But people are taking a fresh look at it now.
18.It has stipulated by the government that ______________. To this stipulation, many people respond actively because ______________.
19.______________ is a common occurrence in our daily life. Whatever we do, ______________ can't be avoided.
20.______________ has become a hot topic among people, especially among the young, and heated debates are right on their way.