根据所听到的短文内容，选择正确的选项。 1. The teacher told the pupils ______. [     ] A. to keep quiet after class B. not to draw on the wall C. not to stand against the wall 2. After the class was over, David ______. [     ] A. went back home B. picked up a piece of chalk C. drew a sun on the wall 3. When David noticed the teacher coming, ______. [     ] A. he covered the drawing with his back B. he cleaned the wall with his hand C. he turned around and ran away 4. What did David find on the wall after the teacher left? [     ] A. He found a sun on the wall. B. He found a picture on the wall. C. He found nothing on the wall. 5. Where was David's drawing at last? [     ] A. It was on the wall. B. It was on David's back. C. It was taken away by his teacher.