—An ant has two stomachs—one for itself, one for others. —Really? Quite interesting. I ________ anything about it. 
#102342
A
don't know
B
have known
C
haven't known
D
didn't know
推荐题目
They became friends again that day.Until then,they_____to each other for nearly two years.
#104068
A
didn’t speak
B
hadn’t spoken
C
haven’t spoken
D
haven’t been speaking
Don’t telephone me at 8 a.m. tomorrow — I ________ a meeting.
#102183
A
am having
B
will be having
C
am about to have
D
have had