When the teacher came into the classroom, the students ____ in groups.
#39479
A
work
B
have worked
C
were working
D
are working
推荐题目
I didn’t hear you, because I ________ yesterday’s football game. 
#41544
A
watch
B
am watching
C
watched
D
was watching
- Where is my raincoat? -I don't have the slightest idea.______ the room?
#36881
A
Did you check
B
Do you check
C
Have you checked
D
Are you checking
The earthquake ____ when I ____ some cleaning.
#40065
A
starts, was doing
B
started, was doing
C
was starting, was doing
D
starts, were doing
— When       you       to learn to skate? — Five years ago.
#39905
A
do; start
B
will; start
C
had; started
D
did; start