―Look! What a mistake! Why?
―Sorry, I _________ on it．
| A．don’t concentrate | B．hadn’t concentrated |
| C．haven’t been concentrating | D．wasn’t concentrating |
Weather___,we’ll go out for a walk
| A．permitted |
| B．permitting |
| C．permits |
| D．for permitting |
The production___steadily,the factory needs an ever-increasing supply of raw material
| A．has gone up |
| B．is going up |
| C．having gone up |
| D．being gone up |
All flight___,we decided to take a train
| A．were canceled |
| B．had been canceled |
| C．having canceled |
| D．having been canceled |
President Hu said in the following months that the eyes of the world would___Shanghai Expo
| A．fix |
| B．fix on |
| C．absorb in |
| D．look at |
They sold their car for only 5,000 dollars,so the buyer got a wonderful___
| A．deal |
| B．bargain |
| C．thing |
| D．value |