根据句意和首字母补全单词。

1. We want some v _____ to help paint the house.

2. The soldier had a terrible w _____in his belly.

3. The little dog w _____  its tail with pleasure.

4. You'd better h _____ if you want to see him.

5. It is n _____ for old people to understand what they think and feel.

6. Mary  r _____  to the door when she heard the car.

7. Mrs. White gave b _____  to a fine healthy baby at her late thirties.

8. The policeman is looking for the o _____ of the dog.

9. You really b _____ quite well.

10. The old woman lives alone. She often feels l _____.

以下哪种消毒方法只适用于单位供水（）

A.氯

B.臭氧

C.紫外线

D.二氧化氯

E.氯胺