He didn't realize he had forgot his bag _____ the plane had taken off.
#79688
A
unless
B
until
C
if
D
or
推荐题目
After ________ seemed a hopeless wait, four coalminers trapped in the mine for 125 hours were finally rescued in Heilongjiang Province.
#30343
A
when
B
that
C
it
D
what
Nearly three months had gone by _________ the seriously injured girl showed a slight sign of recovery.
#30635
A
until
B
before
C
since
D
after
Mother was busy washing dishes ________________ Father was watching TV．
#30098
A
until
B
if
C
since
D
while