问题
His uncle went abroad in 2010, and_____ since.[ ]
A:has not been heard of
B:had not been heard of
C:had not heard of
D:has not heard of
B:had not been heard of
C:had not heard of
D:has not heard of
正确答案是：
同类题型
he group discussion is nearing its end, make sure to ______it with important points.
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1－ I need something for cutting the paper. － Oh,you want a knife? OK, I’ll get ______ for you.
The world will be different, and we will have to be prepared to ______ the change.