He made another wonderful discovery, ______ of great importance to science.
#72556
A
which I think is
B
which I think it is
C
which I think it
D
I think is
推荐题目
Everyone has periods in their lives __________ everything seems very hard.
#73734
A
when
B
where
C
which
D
that
You may have one of these；in other words，you have you choose．
#72508
A
whichever
B
what’
C
no matter what
D
n。matter which
All of the flowers now raised here have developed from those _____ in the forest.
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A
once they grew
B
they grew once
C
that once grew
D
once grew
Tom hid himself behind the door, _______ he rushed out to scare his mother.
#73858
A
which
B
where
C
from which
D
from where