Look at the lost and found case.What's that?It's[ ]book.A the B a

问题描述:

Look at the lost and found case.What's that?It's[ ]book.A the B a
我要听分析,懂了才好,月考就不会错这个了.我补充一句。这两句不是对话,是同一个人说的,我只是省略了下文。

B