1. (2022六上·塔河期末) 将下列句子重新排序，使其成为一段通顺的对话：

A. I'm doing word puzzles.

B. You look worried. Why?

C. Mike. I'm home. Where are you?

D. Because the word puzzles are too difficult (难解的).

E. What are you doing?

F. I'm in my bedroom, Mum.