The argument remains extremely heated there are necessary conditions of existence such as water on the Mars.
#71649
A
that
B
whether
C
if
D
which
推荐题目
There is hardly an environment on earth _____ some species of animals or other have not adapted successfully.
#74134
A
in which
B
on which
C
to which
D
for which
Mother’s Day is coming .It’s time to think of a proper gift for my mother,_____won’t be expensive but will make her happy.
#69168
A
one
B
one that
C
those
D
the one that
As is recorded in history, silkworms（蚕）were first raised by a woman in _________ is today Hebei Province．
#74069
A
where
B
the place
C
which
D
what
It’s a common scene now in Chile that families cry helplessly over ______ is left of their homes.
#71531
A
what
B
which
C
there
D
it
---It’s said that Williams will come to help us.--- we depend on him, we have to do most of the work ourselves.
#67780
A
No matter what
B
However much
C
Whatever
D
However