– Where ______________? – An art exhibition. I think it’s really worth _______ and we can learn a lot from it.
The Xiamen-Shenzhen high speed railroad will run________eight cities.A.acrossB.throughC.over
When the door bell ________I was listening to music.
Yesterday I met Sandy.We________each other since________middle school.
—What did Bob ask you just now?—He wanted to know how long________when he reached the cinema.A.the film had startedB.the film will startC.the film had been on
Helen________her keys in the office so she had to wait until her husband________home.