题目内容
21、I am used to traveling by air and only on one occasion frightened．
A．I have ever felt B．I had ever felt C．did I feel D．had I ever felt
试题答案
21、C
相关题目
I am used to traveling by air and only on one occasion ________ frightened．
- A.I have ever felt
- B.I had ever felt
- C.did I feel
- D.had I ever felt