I am sorry,but I—you were here.When did you come back?A don't know B didn't know 请选...I am sorry,but I—you were here.When did you come back?A don't know B didn't know 请选择一个,

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Iamsorry,butI—youwerehere.Whendidyoucomeback?Adon''tknowBdidn''tknow请选...Iamsorry,butI—youwerehere.Whe

I am sorry,but I—you were here.When did you come back?A don't know B didn't know 请选...I am sorry,but I—you were here.When did you come back?A don't know B didn't know 请选择一个,
I am sorry,but I—you were here.When did you come back?A don't know B didn't know 请选...
I am sorry,but I—you were here.When did you come back?
A don't know
B didn't know
请选择一个,

I am sorry,but I—you were here.When did you come back?A don't know B didn't know 请选...I am sorry,but I—you were here.When did you come back?A don't know B didn't know 请选择一个,
B didn't know 说“我不知道你在这”的时候,实际上是已经知道你在这,所以用过去时

答案选B didn't know
时态要用过去时,与后面的时态一致

B

B

A

不好意思,两个都可以选。
A 表示此刻我不知道你当时在这。
B 表示当时不知道你当时在这。
综合考试人员的IQ,通常他是想让你选B的。

选B.开始不知道,现在知道,。所以第二个