看图，读一读，选择适当句子补全对话。
A. She can't see her pet dog.
B. I'm full now.
C. Can I have some water?
D. I am hungry, Mum.
E. I am sad.
John ________ play the guitar, but he wants to join the guitar club.
西北地区最主要的自然地理特征是（ ）
