Tim, don’t touch the box. There is in it.
The old man has two daughters, but ________ of them lives with him.
. --- Could you tell me _________ for Beijing? --- At 8:30 tomorrow morning.
The library ________ we built last year is the biggest one in Guangzhou.
Before the new year, _________ people went to visit the flower market.
--- When did you meet your English teacher? --- While I _________ a bike along Jiaomen River.