Do you know how long the dinosaurs _____ on the earth before their extinction?
| A．had existed | B．had been existed |
| C．have existed | D．have been existed |
The building windows are bright at night is our school library.
| A．that | B．which | C．whose | D．of which |
Jack has a good habit of keeping a diary every day;he is very good at writing.
| A．because | B．as | C．as a result | D．after all |
He is used to to his office in spite of bad weather.
| A．to walk | B．walking | C．walked | D．has walked |
Hurry up! The train . You know it at 8: 30 am.
| A．leaves; leaves | B．is leaving; leaves |
| C．leaves; is leaving | D．is leaving; is leaving |
I have had my bike , and I’m going to have somebody my radio tomorrow.
| A．repair; to repair |
| B．repairing; to be repaired |
| C．repaired; repair |
| D．to repair; repairing |