问题
选择题
---- An ant has two stomachs --- one for itself and the other for others.
----Really? Quite interesting. I ________ anything about it.
A．don’t know
B．hadn’t known
C．haven’t known
D．didn’t know
答案
答案：D
考查时态。“蚂蚁有两个胃，一个自己用一个为别的蚂蚁。”“真的么？我不知道。”在对话时不知道，所以用一般过去时态。