---- How long ____ at this job?
---- Since 1990.
| A．were you employed | B．have you been employed |
| C．had you been employed | D．will you be employed |
People are paying more and more attention to the environment _____ they live.
| A．that | B．what | C．where | D．when |
Chang’e-3 made China become the third nation _____ an unmanned spacecraft on the moon.
| A．sends | B．to send |
| C．sent | D．sending |
— Could you do me a favor to take this book to John?
— _____
| A．With pleasure. | B．Go ahead. |
| C．Good for you! | D．Come on! |
By the time the storm ended, more than 200 people in that area _____.
| A．were injured | B．have been injured |
| C．would be injured | D．had been injured |
The police ________ the prisoner to see if he had a gun.
| A．searched for | B．searched |
| C．was in search of | D．was in their search of |