—I wonder you water this kind of flower.
—Once a week.
| A．how often | B．how long |
| C．how soon | D．how much |
The library ________ we built last year is the biggest one in Guangzhou.
| A．what | B．who | C．which | D．where |
Before the new year, _________ people went to visit the flower market.
| A．thousands of | B．8 thousands of |
| C．8 thousand of | D．thousand of |
--- When did you meet your English teacher?
--- While I _________ a bike along Jiaomen River.
| A．rode | B．was riding | C．ride | D．will ride |
---How did you go to Guangzhou yesterday?
--- I took a taxi _________ I would be in time for the meeting.
| A．if | B．because | C．as soon as | D．so that |
Guangzhou subway Line 4 helps us to go to Tianhe ________ than before.
| A．most easily | B．easily | C．more easily | D．Easier |