The elevator in the teaching building was always in the summer vacation. That was why I chose to climb the stairs instead.
---How did you find out it is my birthday today? ---_______.
When the young man was shown the evidence, he _______ and told everything he had done to the police.
_______ in the computer game, Peter didn’t notice his father approaching.
_______ I went to the South Lake in Hanzhong, I was deeply impressed with its beautiful scenery.
Sheldon could have defeated Howard in the match, but he _______ too careless at the last minute.