I was on the highway when this car went past fol. Lowed 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 |
When the building was completed, he paid __________ the workers.
| A．off | B．for |
| C．back | D．in |
—I love the Internet. I've come to know many friends on the Internet.
—__________. Few of them would become your real friends.
| A．That's for sure |
| B．It's not the case |
| C．I couldn't agree more |
| D．I'm pleased to know that |
The sight of the snake made his hair __________ on end.
| A．to stand | B．be stood |
| C．stand | D．stood |
—Do you know our town at all?
—No, this is the first time I __________ here.
| A．was | B．have been |
| C．came | D．am coming |
She _____ as the illness grew worse.
| A．strengthened | B．deepened | C．weakened | D．thickened |