--- 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
We don’t know Jack        Bruce.
#56908
A
and
B
or
C
about
D
of
Bill can swim, _______ he can’t sing.
#57157
A
but
B
and
C
or
D
so