I was on the highway when this car went past followed by a police car. They ______ at least 150 kilometers an hour.
| A．should have been doing | B．must have been doing |
| C．could have done | D．would have done |
Kids don’t learn their native language , but they become fluent in them within a few years.
| A．consciously |
| B．effectively |
| C．carefully |
| D．naturally |
such heavy pollution already, it may now be too late to clean up the river.
| A．Having suffered |
| B．Suffering |
| C．To suffer |
| D．Suffered |
——Are you with your present job?
——Not at all. I have long desired I in your company.
| A．satisfy; work |
| B．satisfying; worked |
| C．satisfied; could work |
| D．satisfied; work |
The news quickly around the town.
| A．spreaded |
| B．is spread |
| C．spread |
| D．are spread |
——I will come John is invited, too.
——You mean if John comes you will come.
| A．in case |
| B．so that |
| C．on condition that |
| D．now that |