I was really too busy with my homework and I couldn't help ____________ housework.
| A．doing | B．do | C．did | D．done |
The artist the judge gave a prize is the teacher I have been taught painting for two years.
| A．from whom; by whom | B．to whom; who |
| C．from whom; who | D．to whom; by whom |
Being extremely angry, the boy and went out, saying nothing.
| A．turned up | B．turned out | C．turned down | D．turned around |
China’s economic development has made rapid progress in the past years and young people have made great contribution to this progress.
| A．/ ; a | B．the; / | C．a; a | D．/ ; / |
It's said that going to bed early and getting up early ____a widely accepted good habit．
| A．are | B．is | C．were | D．was |
____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 |