能保持水的化学性质的粒子是（　　）

读课文《我能行》，你能用本文中的词语填一填吗？

贝贝却被____在一边儿，变成了____。

①有利于公民有序参与立法过程，集中民智，反映民意

②有利于做到科学立法、民主立法，提高立法质量

③是全国人大常委会行使监督权促进政府改进工作、对人民负责的体现

④是保障公民行使立法权、实现人民当家作主的要求

Dad, my trousers are old. I want to buy a new ________.

Tom: Hello, Mary. Is this your pencil box?

Mary: No. It's not my pencil box. My pencil box is blue and new.

Tom: Is it Rose's pencil box?

Mary: No. Her pencil box is pink. This pencil box is green and old. What's in it?

Tom: There are four pencils, two pens, six crayons and one ruler.

Mary: Oh, I see. It is Jack's pencil box. His pencil box is lost (丢失).

Tom: OK, let's give (给) it to him.