----When did the concert ?
---Well, two or three years ago?
| A．happen | B．take place | C．hold | D．start |
There are ______ in this building , I live on ______.
| A．nine floors ,the ninth floor | B．nine floor, the ninth floor |
| C．nine floor , nine floors | D．ninth floor,the ninth floor |
The water behind the Three Gorges Dams (三峡大坝) should be ______ higher than downstream（下游）。
| A．sixty-five meter | B．sixty-fifth meter | C．sixty-five meters | D．sixty-fifth meters |
There are _______ days in a year.
| A．three hundred sixty-five | B．three hundred and sixty-five |
| C．three hundred and sixty –five | D．two hundreds and sixty-five |
---How many teachers are there in your school?
--- __________. , but I'm not sure.
| A．Hundreds | B．Hundred | C．Hundreds of | D．One hundred |
There are _________ doctors and nurses working hard in that hospital.
| A．thousand | B．two thousand | C．two thousands | D．two thousands of |