He knew that cholera would never be controlled _____ its cause was found.
#32471
A
till
B
still
C
until
D
kill
推荐题目
Cloning plants is straightforward cloning animals is very complicated .
#34234
A
so that
B
although
C
while
D
as if
We found some precious jars and vases in an ancient tomb, ______you know , are valuable.
#33093
A
even the pieces of which
B
which even pieces
C
even the pieces of them
D
whose even pieces
Susan and I can go to the lecture ___.
#34726
A
but neither can Charles
B
and so Charies can
C
but Charles can’t
D
and Charles also can
I have been advised to arrange for insurance _________ I need medical treatment.
#30738
A
so that
B
unless
C
in case
D
though
We should consider the students’ request _____ the school library provide more books on popular science．
#34411
A
that
B
when
C
which
D
where