．____is known to us is that China has won five gold medals in the 2010 Winter Olympic Games.
| A．It | B．As | C．What | D．That |
About _________of the workers in that steel works are young people.
| A．third-fifths | B．three-fifths |
| C．three fives | D．three-fifth |
The workers can complete the new bridge in_________ .
| A．two and a half month | B．two months and half |
| C．two and a half months | D．two month and a half |
It took me_________days to finish drawing a beautiful horse.
| A．a half dozen | B．half a dozen |
| C．half dozens | D．half dozen |
There were_________the students in our class who are from the north.
| A．two score of | B．two scores of |
| C．two score | D．two scores |
To plant a tree，we must dig_________ .
| A．a three feet deep hole |
| B．three-foot deep a hole |
| C．a hole three feet deep |
| D．a three-feet-deep hole |