根据句意及首字母提示补全单词。

1. Miss Wang t_____ English in No.2 Middle School.

2. A _____ of boys are playing basketball happily.

3. — What's the w_____ like?

    — It's cloudy.

4. I don't like the lion,because it is d_____.

5. His father is a doctor, he works in a h_____.

有齿轮曳引机组成部分不包括（）部件。

A、发电机

B、制动器

C、减速器

D、曳引轮