While reading, you'd better make a mark ___ you have any questions.
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A
on which
B
at where
C
the place where
D
where
推荐题目
The old couple, ____had been admitted to university, were living a hard life．
#70118
A
both their children
B
both of whom children
C
both of whose children
D
whose their children
Air, or _______ is called the atmosphere, surrounds the whole world.
#72829
A
what
B
which
C
that
D
it
A war is so cruel that it always causes great losses, ____ has happened in Iraq and other countries.
#74194
A
what
B
which
C
as
D
one
Why not try your luck downtown, Bob? That’s ______ the best jobs are.
#73023
A
what
B
where
C
when
D
why