化学与生活密切相关，在厨房里蕴藏着许多化学知识．

（1）下列食物中，能提供大量维生素的是      （填字母序号）；

（2）加钙牛奶中的“钙”是指        （填“元素”或“分子”），身体中一旦缺钙，可能患有的疾病是          （填“骨质疏松”或“贫血”）；

（3）厨房中的下列物品中，所使用的主要材料属于天然纤维的是       （填字母序号）；

（4）我们常用洗涤剂清洗餐具上的油污，这是因为洗涤剂具有         的功能；

（5）厨房中能用来除去水壶中水垢的物质是         （填“食醋”或“食盐水”）．

根据句子和中文提示填入单词的适当形式。

1. As they talked, two secretaries sat behind them and took_______ (笔记), jotting down

    everything they said.

2. There's a lot of_______ (交通) in the rush hour.

3. How much did your dress_______ (花费)?

4. Do you often go out for your_______ (假期)?

5. There are two_______ (婴儿)pandas in the zoo.

6. He said_______ (懒惰) was a terrible thing.

7. We are having a_______ (放松的) holiday in a week.

8. Susan does_______ (好) in English than her brother does.

9. He said_______ (帮助) others brought him lots of joy.

10. Tom's hobby is collecting______ (邮票) of animals.