-----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
网友回答
A. don’t know
B. have known
C. haven’t known
(答案→)D. didn’t know
解析：可联系答.案.网客服索取。