It was not until 1911, _______ the first vitamin was identified, _______ people realized the importance of it．
#85155
A
when; which
B
when; that
C
that; which
D
that; that
推荐题目
It was _____ the old clock that the old man spent the whole morning at home.
#85404
A
repair
B
repairing
C
to repair
D
in repair
I really don’t know ___ ___I kept the secret papers.
#85213
A
where was it
B
it was where that
C
where it was that
D
where was it that
I have always been honest and straightforward , and it doesn’t matter I’m talking to .
#85337
A
who is it
B
who it is
C
it is who
D
it is whom
It was not until she failed in the exam ______she realized the importance of study.
#84774
A
when
B
did
C
and
D
that
It was with great courage _______ the boy told the truth ______ he had stolen the money.
#85204
A
that; that
B
which; that
C
when; what
D
which; /