题目

My problem started after I went to a boarding school. I was only 14, and at first I missed my family a lot. I often called them and cried on the phone. But after two weeks, I found I enjoyed being with my classmates at school.I had many friends who were boys. I thought of them as my best friends – but only friends. I never guessed my friendships with boys would become a problem.Then, three months later, my friends told me that some teachers and girls said I was hanging out with boys all day long in order to get attention from them. Seven months after that, the head teacher Mr. Wang asked the This kind of computer is not very cheap, _____ it is veryexpensive.         [     ] A. or else                          B. on the contrary         C. in short                           D. on the other hand