He was just falling asleep _____ there was a loud knock on the door.
#56552
A
while
B
when
C
then
D
until
推荐题目
We can talk with friends on the Internet _______ it’s easier and cheaper.
#58260
A
though
B
as
C
or
D
but
________ you don’t give up, your dreams will come true.
#57287
A
As long as
B
As soon as
C
As well as
D
As quickly as
