21. He apologized ________ late.
| A．to his teacher to arrive | B．to his teacher for arriving |
| C．at his teacher to arrive | D．at his teacher for arriving |
______ that the South African writer John Coetzee won the Nobel Prize in Literature for 2003.
| A．They’er reported | B．He’s reported |
| C．We’er reported | D．It’s reported |
______ is known to us all is that China has launched Shenzhou V spaceship successfully.
| A．That | B．What | C．It | D．As |
He hasn't come yet．What do you consider _______ to him？
| A．happens | B．has happened |
| C．happening | D．to happen |
Unfortunately, when I dropped in, Doctor Li _____ for Beijing to join in the fight again SARS, so we only had time for a few words.
| A．just left | B．has just left |
| C．is just leaving | D．was just leaving |
Children’s brains can’t develop properly_______ they lack protein
| A．when | B．since | C．because | D．unless |