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 |
. It was great joy ________ he received the news that his lost daughter had been found.
| A．because | B．which | C．since | D．that |
. He was just about to give up and return to his bedroom for a good rest ________ he had a bright idea.
| A．but | B．while | C．until | D．when |
. Mother was worried because little Alice was ill, especially ______ Father was away in France.
| A．as | B．that | C．during | D．if |
. The time is not far away ________ modern communications will become widespread in China’s vast countryside.
| A．as | B．when | C．while | D．before |
. Linda was walking in the street ________ she noticed a thief stealing from a old lady.
| A．while | B．when | C．as | D．which |