I arrived late and missed the flight. I the traffic to be so heavy.
| A．hadn’t expected | B．haven’t expected |
| C．wouldn’t expect | D．was expected |
Patience is an important ____ of a happy and rewarding life. After all, some things are worth waiting for.
| A．lesson | B．experience | C．purpose | D．quality |
— What about the price of petrol now?
— It has been ______ 20 percent since the beginning of this year.
| A．increased to | B．risen by | C．increased by | D．risen to |
The old man was taking a walk, ____ by his grandson.
| A．supporting | B．supported |
| C．being supported | D．having supported |
An expert was _____ to give a speech on how to learn English well.
| A．brought in | B．brought on |
| C．brought out | D．brought up |
Scientists have made a major ____ in cancer research.
| A．break-in | B．breakthrough |
| C．breakup | D．breakdown |