That was a very busy street that I was never allowed to cross accompanied by an adult.
#33210
A
when
B
if
C
unless
D
where
推荐题目
A lot of people don’t learn from their mistakes ______ they get hurt.
#31476
A
whether
B
when
C
if
D
unless
Future agriculture should depend on high technology __________ traditional methods.
#32826
A
as good as
B
as far as
C
as well as
D
as long as
I have a tight budget for the trip，so I'm not going to fly ________ the airlines lower ticket prices.(2012·上海，32)
#30443
A
once
B
if
C
after
D
unless
—Are you ready for Spain?—Yes.I want the girls to experience that________ they are young.
#30059
A
while
B
until
C
if
D
before