While dancing happily at home,_______________ .
#68478
A
the door bell rang
B
the door bell rings
C
we heard the door bell rings
D
we heard the door bell ring
推荐题目
I thought the student honest ______ I met him.
#68345
A
first time
B
for the first time
C
the first time
D
by the first time
_____, the car stopped all at once.
#68137
A
Seeing a boy lying on the ground
B
On seeing a boy sitting on the road
C
The driver saw a boy standing on the road
D
The minute the driver saw a boy seated on the road
You will be late_______you leave immediately. 
#72164
A
until
B
if
C
or
D
unless