7.(n. ) 志愿者

8. (adj.) 必要的；必需的

9. (n.) 知识；学识

4. (n.) 化学

5. (n.) 能量;能源

6. (n.) 实验

1. (n.) 展览；展览会

2. (v.) 惩罚；惩处

3. (n.) 物理学

5. 我的爸爸和妈妈都是教师。

my father mother are teachers.

4. 当我爸爸进来的时候我即将做我的作业。

I do my homework when my father came in.

3. ——下周我们将去远足。

—-我们也去。

—We will go hiking next week.

—So we.

2. 他们一家很不幸，母亲死于癌症，父亲在一场车祸中遇 难。

Their family was very unlucky;his mother the cancer;his father a traffic accident.

1. 无论她做什么都是对的。

she was right.

5. Laptops are smaller and lighter they can be carried very easily.

   A. in order to   B. because

   C. so that   D. as if

4. (2014 •河北中考) When you are swimming,your ears. You can use earplugs (耳塞) to stop water getting into your ears.

   A. take after   B. take part in

   C. take off   D. take care of