阅读理解

    Tom, Bill and Dave lost their backpacks. They are at the Lost and Found. The backpacks are the same, but the things in them are different. Can you help them find the right backpack?

Tom: I have a math book and a pencil box in my backpack. There are three pencils, a pen and an eraser in the pencil box.

Bill: I have a Chinese dictionary, a math book and two notebooks in my backpack.

Dave: There are two CDs and three picture books in my backpack. My English book is also in it.