Nowadays现在， there are more and more __ _ in _+名词_ _. 在。。。反面有越来越多的。。。It is estimated that ___. 据估计。。。Why have there been so many ____?为什么有这么多。。。 Maybe the reasons can be listed as follows. 也许原因如下。。。 The first one is ______. 第一个原因是。。。Besides，而且。。。_____. The third one is _____. 第三个原因是。。。To sum up总之， the main cause of it is due to _____.最主要的原因是由于。。。 It is high time that something were done upon it是时候我们来改善它了. For one thing，一方面我们可以做。。。_____. For another thing， _____另一方面我们可以。。。. All these measures will certainly reduce the number of _____. 所有的这些措施都可以确切的减少。。。