通读下面短文，掌握其大意，然后在各题所给的四个选项（A、B、C和D）中选出一个最佳答案。

    One day, the students are having a(an) 1 class. Everyone begins to draw a picture. Li Lei is very 2 . When the class is over, Li Lei  3 his picture to the teacher.

    The teacher looks at it and gets angry." Why do you give me a piece of 4 paper, Li Lei?"  5  the teacher.

    "I am very sorry, sir. I draw a dog and some  6 on the paper," says Li Lei.

    "Where are the dog 7  the hamburgers?"

    "I draw some hamburgers  8 . After I finish drawing the  9  , it eats up the hamburgers.  10 I give the picture to you, the dog runs away," says Li Lei.