选择正确的答句。
（1）How long is the Great Wall?
（2）How old are you?
（3）Can we walk along all of the Great Wall?
（4）What is he doing?

A．He is visiting his cousin.

B．I am ten years old.

C．It’s around forty thousand li long.

D．No, we can’t.

科目 英语   题型 选择题   难度 容易

知识点： 情景交际