In the front of the hall _______ a group of pupils, who were listening to the lecture attentively.
| A．were sitting | B．sat | C．sit | D．was sitting |
The scientist won the Nobel Prize in Chemistry, ________ made him famous all over the world.
| A．this | B．that |
| C．what | D．which |
The result was not the same ________ the professor had expected, ________ was rather disappointing.
| A．as; which | B．which; as |
| C．as; that | D．that; which |
Was it through Mary, ________ was working at a high school, ________ you got to know Tom?
| A．who; who | B．that; which |
| C．who; that | D．who; which |
Nowadays people are more concerned about the environment ________ they live.
| A．what | B．which |
| C．when | D．where |
In spite of all ________ has been said, quite a lot of people are still uncertain about the prices of housing in China.
| A．what | B．/ |
| C．which | D．that |