He was too busily occupied _____ to the show.
| A．to go | B．going |
| C．with going | D．in going |
An increase in the price of drugs has __________ the rising cost of medical care.
| A．resulted from | B．brought up. |
| C．burst into | D．contributed to |
We __________ the old scientist __________ his contribution ________ the country.
| A．admire; for; to | B．admire; at; to |
| C．respect; on; for | D．respect; on; at |
The reason __________ he refused to attend the meeting was that they didn't give him an invitation earlier.
| A．how | B．which |
| C．why | D．because |
The reason __________ he explained was __________ he was ill and unable to go to school.
| A．why; that | B．why; because |
| C．which; because | D．which; that |
Last week I bought a cellphone，__________ was very reasonable.
| A．price of which | B．the price of whom |
| C．of which price | D．whose price |