—Excuse me, sir. Smoking is not allowed here.
—Oh, sorry. I ________.
—Oh, sorry. I ________.
A.didn’t know | B.hadn’t known | C.don’t know | D.haven’t known |
更新时间:2022-03-31 20:51:09
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【知识点】 过去发生的动作/状态解读
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