1. 补全对话。

A：

B：It's my new pencil box.

A：

B：Open it and see.

A：                        

B：No. I only have four pencils.  

A：Oh, yes. Four pencils.                

A. The red one is a pen. B. What's this? C. 1, 2. . . I see 5. D. How many pencils do you have?