12、[阅读理解]What can be learned from the second paragraph? A. Mark stopped his father from throwing the paper away. B. Mark thought people shouldn't waste paper. C. Mark was interested in social studies. D. Mark's father was a careful writer.
13、[阅读理解]Mark inspired his schoolmates by______. A. cycling to the school B. going to class on time C. giving speeches D. putting up posters in the school
15、[阅读理解]The principal thanked Mark because Mark had A. helped bring back his lunch B. planted trees in the school C. influenced others in a positive way D. saved paper for the school