第24题: [单项选择]Why will Bob and Sarah write a letter to the dean about the computer center A. To ask for permission to use it at special hours. B. To get the broken computers removed. C. To complain about the technical assistant. D. To request additional computers and longer hours. 参考答案:D 答案解析:[解析] 本题仍为细节题。题目问:为什么Bob和Sarah要给系主任写关于计算机中心的信从对话中的这个句子“You know, we could explain the problem and mak