It will be many years ______ the doctors and medical scientists can find _____ for cancer.
#33643
A
since; cures
B
when; treatments
C
before; cures
D
until; treaments
推荐题目
23. Tom had to be told two or three times ________ he could remember what the teacher said.
#79646
A
before
B
when
C
until
D
As
Is it the country ________ you studied ________ you are going to visit next week?
#33526
A
in which; which
B
where; that
C
that; that
D
where; where
. It is uncertain __ side effect the medicine will bring about, although about two thousand patients have taken it.
#34730
A
that
B
what
C
how
D
whether
I should have bought the beautiful vase, but I ____________enough money.
#32878
A
didn’t have
B
don’t have
C
haven’t had
D
hadn’t had