--- An ant has two stomachs --- one for itself, one for others.
--- Really? Quite interesting. I ____ anything about it.
A. don’t know B. have known C. haven’t known D. didn’t know
--- An ant has two stomachs --- one for itself, one for others.
--- Really? Quite interesting. I ____ anything about it.
A. don’t know B. have known C. haven’t known D. didn’t know
D