Have you ever seen any trees ________ leaves were black because of the polluted air?
A．whose B．that
C．which D．who
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
