根据汉语意思填空。

1. Our English teacher is a _____ (英俊的) man.

2. Our head teacher has a sense of humour. He is one of the most

_____(受欢迎的)teachers here.

3. My best friend is Jacky. He is both helpful and _____ (慷慨的).

4. Mike is a brave boy. We all _____ (钦佩) him very much.

5. Tony is good at cooking. He can cook a lot of _____(美味的)

food.

．目前，在我国城市环境中主要的大气污染物是

A．CO₂、CO、N₂、酸雨

B．NH₃、CO₂、NO、雾

C．HCl、SO₂、N₂、粉尘

D．SO₂、NO₂、CO、粉尘