--- When did your father come back last night?--- He didn’t come back _______ he finished all the work.
#56358
A
until
B
while
C
if
D
unless
推荐题目
When you are learning English, use it, ________ you won’t make great progress.
#57425
A
but
B
or
C
and
D
/
You will fail your next exam ______ you start to work hard at your study now.
#58175
A
because
B
unless
C
so
D
if