The old man often looked back on the past days ________ he worked hard to make a living.
A．which B．when
C．where D．that
Recently I have bought an iPad 3 on the website of taobao. com, ________ the price is very reasonable.
A．on which B．in which
C．of which D．from which
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
