题目

阅读下面短文，从短文后各题所给的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项。 Some people say thatchildhood is the best time of your life.1, being a child has bothadvantages and disadvantages. On the good side, you havevery few responsibilities.2, you don't have to go to3, pay bills, or do theshopping, cooking, or cleaning. This4you have plenty of free5to do whatever you want —watch TV, play on the computer, go out with friends, play sports, or enjoyother6. On top of that, publictransport, cinema, and sports centers7much less for children下列实验能获得成功的是A.用溴水可以鉴别苯、CCl4、己烯B.加浓溴水，然后过滤可除去苯中少量己烯C.苯、溴水、铁粉混合制成溴苯D.可用分液漏斗分离己烷和苯的混合物