题目

If the students who killed themselves had only been more confident, their deaths ________. A. need have been avoided                                B. must have been avoided C. might have been avoided                               D. will have been avoided 答案：C 解析: 略It is thought ________ 60 million people on the Net, connected up to over 15 million computers. A．to be B．there could be C．to have D．there to be