—I rang you at about nine, but there was no reply.
—Oh, that was probably I was seeing the doctor.
| A．why | B．when | C．what | D．that |
If you don't buy insurance for your car，you may ______losing everything when it gets destroyed in an accident.
| A．delay | B．deny | C．avoid | D．risk |
A large park ________here now.They hope to finish it in three months.
| A．is built | B．will be built |
| C．has been built | D．is being built |
Mothers holding jobs outside the home should have ________schedules to make it easier to care for their children.
| A．heavy | B．smooth | C．flexible | D．complex |
The twins were so much alike that we had great trouble ________one from the other.
| A．distinguishing | B．to distinguish |
| C．distinguish | D．distinguished |
Walk faster，________you may catch up with your friends ahead.
| A．or | B．but | C．and | D．yet |