问题

t 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
B:have known
C:haven't known
D:didn't know
正确答案是:
同类题型
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as out of the room, he took aquick look at the papers on her desk.
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