I ______ along the road when I saw Peter. So we stopped and had a chat.
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.