下面题中均有一处是错误的，请改正。

1. They are her apple.                                                          

2. — Is these your Chinese book?                                         

    — Yes, it is.

3. — Where are my shoes, Granny?                                      

    — It's right under your desk.

4. — Where's Jim? Do you know?                                         

    — Sorry. I am not know.