— Kitty, do you know ______?
— Sure, about forty minutes.
A. when did their class meeting begin.
B. where their class meeting was held
C. how often their class meeting is held
D. how long their class meeting will last
— Kitty, do you know ______?
— Sure, about forty minutes.
A. when did their class meeting begin.
B. where their class meeting was held
C. how often their class meeting is held
D. how long their class meeting will last
D