This building is both a secret and a mystery. No one shall be admitted into it ______ he can give the right password.
#32225
A
if
B
as
C
since
D
unless
推荐题目
Darwin counted 225 flowering plants, ______ he collected and brought home 193.
#33868
A
which
B
for which
C
in which
D
of which
I don't know why she is looking at me she knew me. I've never seen her.
#31806
A
as
B
although
C
even if
D
as if
It was in the Xichang Satellite Launch Center , ________ I had visited, ________ Chang’eⅠwas launched at about 6:05 pm October 24, 2007.
#32790
A
where; that
B
which; that
C
that; where
D
which; where