题目

— Where does he come from, could you tell me? —Pardon? —I asked where ________? A. did he come from                     B. he came from C. he comes from                        D. does he come from 答案：B某学校举办一次数学知识竞赛活动，竞赛题共有25道题，规定做对一道题得4分，不做或做错一道题扣1分．李伟最后竞赛成绩是90分，那么李伟一共做对了几道题？