【題目】(2013四川瀘州)Oh，you are here．I ________ you came back．

A．don’t know

B．didn’t know

C．haven’t known

D．won’t know

【答案】B

【解析】句意：哦，你在這里，我不知道你回來了。顯然現(xiàn)在已經(jīng)知道了，所以要用過去時(shí)，表示“原來”不知道，所以選擇B。

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