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 |
．At the meeting they discussed different ______ to the study of mathematics.
| A．approaches | B．means | C．methods | D．ways |
The children were warned of not being too _______ about things you are not supposed to know.
| A．strange | B．amusing | C．curious | D．satisfied |
．It was difficult to guess what her _____ to the news would be.
| A．impression | B．comment | C．reaction | D．opinion |
Having been attacked by terrorists，________．
| A．doctors came to their rescue | B．the tall building collapsed |
| C．an emergency measure was taken | D．warnings were given to tourists |
We must know what we should do and what we should avoid ______a good impression on others in public place.
| A．to leave | B．leaving | C．to have left | D．leave |