19. Being disabled is not terrible, because we can still lead wonderful lives　　　 we don't give up ourselves.

A. even if　　　 　　B. as long as　　　　 C. so that　　　　　 D. now that

18. Students in this school don’t have classes on Wednesday afternoon, which is　　　 , for teachers have a meeting.

A. practice　　　 　　B. action　　 　　　C. experience　 　　D. sense

17. It is required that the students　　　 mobile phones in their school, so seldom　　　 them using one.

A. should not use; you will see　　　 　　　　　　 B. don't use; will you see

C. not use; will you see　　　　　　　　　　　　　　　　 D．not use; you will see