补全对话
根据对话内容，选择适当的句子填入空白处，使对话完整（有两项是多余的）。
A: Hey, Jenny. Look at the woman standing at the school gate.          .
B: It must be our teacher, Mrs Smith.
A: No.          .
B:                  .
A: Because she has gone to Shanghai for a meeting.
B:                   .
A: It might be about the changes in the new textbook.
B: When will she come back?
A: She could be back the day after tomorrow.
B:                  .
A: OK.

A. Why do you think of? B. It can’t be her. C. Then let’s visit her when she is back. D. What’s the meeting about? E. Who is she? F. When did she go? G. Let’s go there together.