I have about ( ) friends in my school.A twenty B twenty one C twenty-first D nineteen选什么 请说出原因

Fri, Sorry to bother you.would you mind share more infromation about the web courseware with me?Hello,Sorry to bother you.I have found an article of Web's courseware which you have upload in BaiDu.I am a student of WEB right now,And i want to become a fri I have no regret about... i dont think about what i have done,i think about what i have contributed I have a question about r_____ English I have no idea about it. I have been thinking about you I have about three h___English book i have no idea about latest i have a p--- about the moviert I have about three h____ English book I have a question,not about you. I have known nothing about everything是什么意思? i have no kndwledge about it I have beard about him have可以换成already吗? all,about,have,I,the,have,now,that's,news I know you but I have never know about mp3 I have been defeated,but I do not care about.