Many clothing manufacturers now substitute artificial silk _____ natural silk to cut down costs of production．
| A．with | B．by | C．for | D．of |
When copying the letter, pay special attention not to any words．
| A．leave alone | B．leave out | C．leave behind | D．leave aside |
I should consider myself failing my duty if I didn’t take action at that moment．
| A．sudden | B．general | C．personal | D．immediate |
Rising from to a position of power, Mr．King is still working very hard．
| A．nothing | B．everything | C．something | D．anything |
In week or so．I’11 be among unemployed，I’m afraid．
| A．小填；a | B．a；不填 | C．a；the | D．me：不填 |
The World Expo 2010 is being held at a time the world is looking for a new kind of balance between nature and cities．
| A．when | B．where | C．which | D．that |