Nancy was badly injured in the accident yesterday and she was sent to hospital.–Oh,really?I ___a、hadn’t know b、don’t know c、didn’t know d、haven’t known

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Nancy was badly injured in the accident yesterday and she was sent to hospital.–Oh,really?I ___a、hadn’t know b、don’t know c、didn’t know d、haven’t known

Nancy was badly injured in the accident yesterday and she was sent to hospital.–Oh,really?I ___a、hadn’t know b、don’t know c、didn’t know d、haven’t known
Nancy was badly injured in the accident yesterday and she was sent to hospital.–Oh,really?I ___
a、hadn’t know b、don’t know c、didn’t know d、haven’t known

Nancy was badly injured in the accident yesterday and she was sent to hospital.–Oh,really?I ___a、hadn’t know b、don’t know c、didn’t know d、haven’t known
选C .指过去不知道,现在知道了.

C 我过去不知道,起始时间点在现在,即与现在相比