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
—How long has Eliza been a nurse?—___________. 
#55503
A
Since 2002
B
Four years ago
C
In 2002
D
For 2002
I didn’t _____ you were going to leave_____ 3 o’clock.
#55121
A
find; at
B
realize; until
C
remember; before
D
tell; after