用所给单词的适当形式填空

1. Jack____(have)a medium build.

2. He is very tired, but he doesn't stop________ (work).

3. My brother____(likes)____(read)playing chess.

4. The famous____(sing) came to our school yesterday.

5. My English teacher loves____(tell)jokes.

欲除去混入一氧化碳中的少量水蒸气. 氧气. 二氧化碳，应通过下列哪组物质[ ]

A. 加热的铜丝网，浓硫酸，氢氧化钠溶液

B. 氢氧化钠溶液，浓硫酸，加热的铜丝网

C. 浓硫酸，氢氧化钠溶液，加热的铜丝网

D. 加热的铜丝网，氢氧化钠溶液，浓硫酸