----- _______ in the workshop. Please stop it. ----- Sorry. I________.
#104153
A
Smoking is not allowed, don’t know
B
Not smoking, an not sure
C
Don’t smoke, have no idea  
D
Smoking is forbidden, didn’t know
推荐题目
My brother wants to work in the factory which _________ now.
#101300
A
is building
B
has been built
C
is being built
D
is to be built
A fire broke out in the neighborhood last night. By the time the firemen arrived, it    . 
#101011
A
had been put out
B
would put out
C
has been put out
D
was putting out