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--- An ant has two stomachs --- one for itself, one for others.
--- Really? Quite interesting. I ____ anything about it.
A．don’t knowB．have knownC．haven’t knownD．didn’t know
D
考查時(shí)態(tài)。句意：螞蟻有兩個(gè)胃——一個(gè)給自己，一個(gè)為別人�！娴膯�？相當(dāng)有趣兒。關(guān)于這個(gè)事我一點(diǎn)都不知道。結(jié)合語境可知描述的是過去的狀態(tài)，故用過去時(shí)態(tài)，選D。
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