According to what he complained about, something must have gone wrong with the computer, ______?1 According to what he complained about, something must have gone wrong with the computer, ______? A. mustn't it B. didn’t he C. hasn’t he D. didn’t it答案D,说下理由
问题描述：
According to what he complained about, something must have gone wrong with the computer, ______?
1 According to what he complained about, something must have gone wrong with the computer,
______?
A. mustn't it B. didn’t he C. hasn’t he D. didn’t it
答案D,说下理由
答
must 用来表示猜测 时,其反义疑问句的助动词须与原先的助动词相同
此句中,因为是过去时,have 应该用did
再如
he must be working right now, isn't he?