---Be careful! Your clothes will catch fire.  
---Thank you._______ so close to the fire.
A．I didn’t know I was B．I don’t know I am
C．I hadn’t known I wasD．I don’t know I was
A
考查時(shí)態(tài)。句意：當(dāng)心，你的衣服要著火了。——謝謝你。我不知道我的衣服離火是如此的近。結(jié)合語境可知主句表示的是剛才的動(dòng)作，從句描述的剛才的狀態(tài)，故都用過去時(shí)態(tài)，選A。
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