Twin Sisters in Our Class　　Li Bao and Li Bei are twin sisters in our class. They look very much alike. But they are different in character. The former... is an introversive ①girl; the latter extroversive ②in doing things. In spite of this, they have many same points.　　The two are good at studies. They come, to school early every day. Before classes they read English or Chinese texts and often recite good articles or poems. In the classes they listen to the teachers attentively.　　When the teachers ask questions, they are always active in answering them. After school they carefully do their homework. If they are not clear of something they ask the teachers or classmates for help. They never let off any problems that they do not understand. So they always achieve excellent marks in examinations.　　They both like to help others. On the buses they offer their seats to the old. In the streets they support the blind across the roads. At home they help the parents with housework. In the school they like to do something for the teachers and schoolmates. Once Mr. Liu moved his house,the twin sisters carried what they could for the teacher till late in the evening. Last term I caught a bad cold and stayed in hospital. Li Bao and Li Bei delivered the meals from my home to the hospital in turn. Because of these they are praised by everybody in our school.