A lot of people don’t learn from their mistakes ______ they get hurt.
#31476
A
whether
B
when
C
if
D
unless
推荐题目
They were surprised that a child should work out the problem _____ they themselves couldn’t.
#31931
A
when
B
where
C
until
D
while
The days are gone ________ physical strength was all you needed to make a living.(2011·天津，10)
#30486
A
when
B
that
C
where
D
which
_________ there are certainly times when giving up trying is the right thing to do, in most cases all needed is commitment and communication.
#30109
A
Unless
B
Before
C
Although
D
Since
It’s much easier to make friends you have similar interests.
#31193
A
unless
B
when
C
even though
D
so that