根据短文内容回答问题或填空完成句子。

     It is a fine day. Zhou Jun and his friends Steve, Lucy and Amy are out for a picnic. They are in the

beautiful countryside (乡下). There is a clean river, wide open green field (野外) with beautiful flowers

and some big trees.

     Look! Lucy is preparing food. Steve is staring (开始) a fire. Amy is washing the dishes. What's Zhou

Jun doing? He is carrying water. He is strong. Some birds are singing in the sky. How happy they are!

1. What are they doing?

    _____________________________________________

2. What's Lucy doing? 

    _____________________________________________

3. Is Steve carrying water? 

    _____________________________________________

4. Some birds _________ _________ in the sky.

5. It is a fine day. _________ _________ they are!

随着“双创一巩固”活动的开展，空气质量越来越受到人们的关注．下列物质中，未计入遵义市监测空气污染指数项目的是（　　）

A．氮气

B．二氧化硫

C．一氧化碳

D．可吸入颗粒物