A huge amount of oil was spilt on the East Sea, the causes of ______ are still under investigation.
#78658
A
it
B
that
C
which
D
whom
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The teacher doesn’t believe his reason for being absent from class ___ he was ill, ____mad him sad.
#78688
A
that ; which
B
why; which
C
why; what
D
that ;what
Now everyone is concerned about how to conquer the economic crisis, __________is very important for us to preserve our standard of living．
#78697
A
which success
B
its success
C
the success of which
D
the success of it
Rock-climbing is a breathtaking activity, very popular nationwide among young people, cooperation as well as courage plays an important role.
#78694
A
who
B
which
C
that
D
where
My friend introduced two new films to me, seemed to be touching judging from the name.
#78671
A
none of which
B
either of that
C
neither of which
D
both of them