It was not until all the fish died in the river_____the villagers realized the serious pollution.
| A．where | B．that | C．what | D．which |
— Have you heard about the recent election?
— Sure, it ________ the only thing on the news for the last three days.
| A．would be | B．is | C．has been | D．will be |
— I don’t understand why you didn’t go to the lecture yesterday afternoon.
—I'm so sorry, But I ________ my homework.
| A．had done | B．was doing | C．would do | D．am doing |
The girl has a great interest in sport and ____ badminton classes twice a week over the last three years.
| A．took | B．is taking | C．takes | D．has been taking |
（2013·北京卷) Don’t turn off the computer before closing all programs you could have problems
| A．or | B．and | C．but | D．So |
（2013·北京卷)Shakespeare’s play Hamlet into at least ten different films over the past years.
| A．had been made | B．was made |
| C．has been made | D．would be made |