看图，读一读，选择适当句子补全对话。

A. Would you like some milk?

B. We can read books at home.

C. Good idea.

D. How is the weather in winter?

E. Why don't you play football?

①该工程以洛阳为中心，北至涿郡，南达余杭

②它的开通沟通了我国南北交通

③它的开通大大促进了我国南北经济交流

④它是隋炀帝下令开凿的。