Clean water and fresh air are essential for our daily life, _______ we can’t live.
#66990
A
by which
B
without which
C
that
D
on which
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Although he knew little about the large amount of work done in the field, he succeeded ________ other more well - informed experimenters failed.
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A
which
B
that
C
what
D
where
The hill ____ is covered with tress is called Huang Hill.
#68719
A
of which top
B
whose the top
C
whose top
D
top which
___________ is known to everybody, the noon travels around the earth once every month.
#71749
A
It
B
As
C
That
D
What
10. We went through a period _____ communications were very difficult in the rural areas.
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A
which
B
whose
C
in which
D
with which
We cannot figure out ________ quite a number of insects, birds, and animals are dying out.
#73021
A
that
B
as
C
why
D
When