问题
His sister left home in 1998, and ____________ since.
A:had not been heard of
B:has not been heard of
C:had not heard of
D:has not heard of
B:has not been heard of
C:had not heard of
D:has not heard of
正确答案是：
同类题型
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25The American Civil War lasted four years _____the North won in the end
I’m dead tired. I can’t walk any further, Jenny. —-_______, Tommy. You can do it.
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