2014考研英语作文经典句子：段首句(3)

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　　考研英语作文经典句子之段首句，背诵后会使你的写作水平突飞猛进，记住一定要烂熟于心，减少遗忘。
        　　考研英语作文段首句：
        　　15.________ has become a hot topic among people, especially among the young, and heated debates are right on their way.
        　　16.Recently, ________ has become the focus of the society, and in this way.. People swarm to ________.
        　　17.________ 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.
        　　18.Man is now facing a big problem-________, which is becoming more and more serious. First, ________ second, ________.
        　　19.Nowadays more and more people are beginning to be aware of the seriousness of ________.
        　　20.It is only during the last years that man has become generally aware that ________.
        　　21.There is an old saying, ________. It's the experience of our forefathers, however, it is correct in many cases ever today.