He paid for a seat,when he__have entered free.
举一反三
- He enrolled for ______ in the Free University of Poland when he was 20.
- 原：When he entered the office, he was still annoyed by the way she had spoken to him. 改：He entered the office he still annoyed by the way she had spoken to him.
- How old was Johnny when he first entered high school A: He was 15. B: He was 14. C: He was 16.
- ______the jungle did he realize that there was danger everywhere in it. A: Upon entering B: When he entered C: Only after entering D: After he had entered
- He got into trouble when he paid his bills with rubber checks.