Do you know the man_______ saved five people in the fire?
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.
---How did you go to Guangzhou yesterday? --- I took a taxi _________ I would be in time for the meeting.
Guangzhou subway Line 4 helps us to go to Tianhe ________ than before.