Many athletes are clear that the Olympic Games are the only time ________ they will be watched by thousands of millions.
A.that B.which
C.where D.when
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