大蒜中含有一种有效成分辣素“硫化丙烯”，其化学式为C₃H₆S，能杀菌，具有一定的抗病功能和食疗价值．请从硫化丙烯的化学式中获得的信息写出两条：

（1）____；

（2）____．

“普及高中阶段教育，逐步分类推进中等职业教育免除学杂费”，十八届五中全会的这一决定（    ）

①有利于维护教育公平发展              ②有利于促进社会和谐稳定

③能完全激发人的潜能和发展          ④能更好地保障学生的受教育权

    Billy doesn't go to school today. He wants to read a storybook. His brother bought(买)one for him yesterday. (1) Billy likes this book.

    Billy goes to his bookcase. The book is not there. Billy looks under the bed. but it isn't there. (2) No, it isn't. He looks inside his schoolbag,but he still(仍然)can't find the book. Billy isn't happy. (3) Billy goes to the living room(客厅). His mum is reading a book on the sofa.

    " (4) "asks Billy.

    "Which one?"says his mum.

    "The one about a dog. "says Billy.

    "It's in your brother's bedroom. "says his mum. "I found it on the table after breakfast. I thought it was his book. (5) "

    "Great! Thanks, Mum, "says Billy.

根据材料内容, 从方框中选择合适的句子填入文中空缺处, 使材料完整、通顺。

A. Is it under the chair?

B. Does he lose the book?

C. It is about a nice dog.

D. So I put it in his bookcase.

E. Mum, did you see my storybook?

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