参考模式如下：
Nowadays, there exists an increasingly serious
social/economic/environmental problem. ________(具体的社会问题或者现象)has increasingly become a common concern of the public. According to a survey, ________(说明这种现象的情况或者举一个例子).
There are a couple of reasons behind this problem/phenomenon. For one thing, ________(理由一); for another, ________(理由二). What is more, ________(理由三).
Based on the above discussions, I can easily forecast that more and more people will ________(作出某种反应).
模板范文鉴赏
Nowadays, there exists a common phenomenon：with the development of the Internet, more and more people tend to send electronic cards instead of paper ones to their friends and relatives when an important holiday comes.(具体现象)
There are a couple of reasons behind this phenomenon. For one thing, compared with the traditional cards, electronic cards are livelier and more interesting. They can give not only pictures but also sound and animations. For another, there are many websites online which offer varieties of cards to you to choose from. What is more, with the
popularity of the electronic cards, less paper is used in making paper cards, which does good to our environment.(理由)
Based on the above discussions, I can easily forecast that sending greetings by using electronic cards will be accepted by more and more people.(预测前景)
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