—When did your cousin begin to show his interest in medicine?—It was a Saturday ___ she noticed her uncle experimenting on a frog in his lab.
#34174
A
that
B
what
C
when
D
which
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(2013·山东青岛2月质检)________ you need something, please don't hesitate to let me know.
#30549
A
Even though
B
In case
C
As though
D
Even if
I prefer a school ______teachers have to work as a team, instead of fighting against each other.
#32982
A
where
B
that
C
as
D
when
The UN officials say it could be many weeks and even months ____ a deal is reached．
#33995
A
before
B
after
C
when
D
as