I ________ traveling by air and only on one occasion have I ever felt frightened.
举一反三
- At no time _________ more frightened than now. A: I had ever been B: I have ever been C: had I ever been D: have I ever been
- He is used to flying by air and on no occasion _______frightened.
- I felt extremely excited as it was the first time that I（）abroad at all. A: 'have ever been B: would have ever been C: had ever been D: was ever
- 中国大学MOOC: I felt disgusted and wondered how I could ever have been so______.
- The question is one of (difficult) _______ that I have ever answered.