—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
推荐题目
All the photographs in this book，________ stated otherwise，date from the 1950s.(2012·陕西，25)
#30219
A
unless
B
until
C
once
D
if
With some technical problems to be solved, it may be a while the system is put into use.
#33190
A
when
B
after
C
since
D
before
Mr. Green has made another wonderful discovery, ______ great importance to science.
#34201
A
which I think is of
B
which I think it is of
C
that I think is of
D
I think which is of
Well, you can buy $20 tickets or 30 $ tickets, ______ you prefer．
#79736
A
which
B
whichever
C
whatever
D
what
well prepared you are，you still need a lot of luck in finding a suitable job．
#30191
A
However
B
Whatever
C
No matter
D
Although