--- 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
If I ______ five minutes, I will get everything ready. 
#57664
A
will give
B
be given
C
am given
D
was given
 Her father __________ time.     
#58552
A
usually waste
B
never wastes
C
hardly ever waste
D
always wasting