Ⅲ. Look and write.看图,根据范例写句子。
What is the boy doing?
He is cleaning the floor.
What is the girl doing?

She is playing with toys.
What is the boy doing?
He is running.
What is the girl doing?
She is singing.

本题考查现在进行时的问答句型，问句用“What + be动词 + 主语 + doing?”询问正在进行的动作，答语用“主语 + be动词 + 动词-ing形式 + 其他”来回答，需结合图片内容完成句子。

Ⅳ. Read and choose.读一读,补全对话。
Billy is on the train to Xi'an with Mum.
Mum: What are you doing, Billy?
Billy: 1
Mum: 2
Billy: I see many cars and buses on the road. 3
Mum: I'm reading the newspaper.
Billy: Look! I see some rice and fish.
Mum: 4
Billy: Sorry, Mum.
Mum: 5
Billy: Yes, please.
A. Billy, please don't point.
B. What are you doing, Mum?
C. Would you like some fruit?
D. What do you see?
E. I'm looking out of the window.

1.E；2.D；3.B；4.A；5.C

本题需结合对话上下文语境选择合适的句子：
1. 上句妈妈询问Billy正在做什么，应回答自身动作，E选项“我正在往窗外看”符合语境。
2. 下句Billy回答看到的事物，此处妈妈应询问Billy看到了什么，D选项“你看到什么了？”符合。
3. 下句妈妈回答自己正在读报纸，此处Billy应询问妈妈正在做什么，B选项“妈妈，你正在做什么？”符合。
4. 下句Billy道歉，说明妈妈提醒了他不要做某个动作，A选项“Billy，请不要用手指指点点”符合语境。
5. 下句Billy回答“Yes, please.”，说明妈妈提出了相关邀请或需求询问，C选项“你想要一些水果吗？”符合。