1.Not until he retired from teaching three years ago he consider having a holiday abroad.
答案:did
2.Only after Mary read her composition the second time she notice the spelling mistake.
答案:did
3.The headmaster will not permit the change in the course,nor he even give it a thought.
答案:will
4.Only when he reached the tea-house he realize it was the same place he’d been in last year.
答案:did
5.—It’s nice.Never before I had such a special drink!
—I’m glad you like it.
答案:have
6.John opened the door.There (stand)a girl he had never seen before.
答案:stood
