根据对话的情景,从方框中选择适当的句子,使对话完整通顺。 A. What's on it ? B. There is a pencil-box. C. There are 24boys and 21girls in our class. D. Put it away, please. E. Thank you. Jane: Hi, Bill. Your classroom looks so beautiful. Bill: 1 Jane: How many students are there in your class? Bill: 2 Jane: Look at the white wall. 3 Bill: There is a clock on it. Jane: Oh, what's under the teacher's desk? Bill: 4 Oh, it's my pencil-box. I am looking for it. Jane: Don't put it there. 5 . You must look after your things. Bill: OK, I will. Jane: Listen! There goes the bell(铃). Let's go to have classes. Bill: All right.