关 键 词： 话题 小学二年级 150字
字 数： 150字作文
本文适合： 小学二年级
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Nowadays, there are more and more __ _ in __ _. It is estimated that ___. Why have there been so many ____? Maybe the reasons can be listed as follows. The first one is ______. Besides,_____. The third one is _____. To sum up, the main cause of it is due to _____. It is high time that something were done upon it. For one thing,_____. For another thing, _____. All these measures will certainly reduce the number of _____.