The air pollution of the city ____ by 20 percent thanks to the strict measures taken by the government.
| A．has been fallen down | B．has been increased |
| C．has been reduced | D．has been risen |
-When are you leaving?
-My plane _____ at six.
| A．took off | B．is about to take off |
| C．takes off | D．will take off |
If you keep on, you’ll succeed _____. Wish you success in the examinations.
| A．in time | B．at one time | C．for the same time | D．sometimes |
If you carry on working like this, you will _____ sooner or later.
| A．give off | B．get down | C．break down | D．hold on |
-What’s the old man standing there?
-He is _____, a new comer.
| A．Mr. White | B．an engineer | C．Joe | D．Joe’s brother |
-When ____ you return the dictionary to me?
-Only when I ____ you next Sunday.
| A．will；see | B．do；will see | C．will；will see | D．do；see |