Only when he had done it that he had made a mistake.
举一反三
- He soon realized that he ______ a mistake. A: has made B: makes C: had made
- 如果他听了我的劝告，他就不会犯这样的错误了。 A: If he took my advice,he would not have made such a mistake. B: If he had taken my advice,he would not have made such a mistake. C: If he had taken my advice,he didn't make such a mistake. D: Had he taken my advice,he would have made such a mistake.
- He was criticized for _____. A: he had done it B: what he had done C: what had he done D: that he had done it
- Little ____ that he had made such a serious mistake until he checked up the bill.
- They had made a mistake. They had been ____. A: mistake B: correct C: right D: wrong