问题
Excuse me, but could you please turn the radio down?——Sorry, I _________ you could hear it.
A:don’t realize
B:haven’t realized
C:didn’t realize
D:hadn’t realized
B:haven’t realized
C:didn’t realize
D:hadn’t realized
正确答案是：
同类题型
______ your sister ______ in Greener China for a long time?—Yes.She joined it five years ago.
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