问题
选择题
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
答案
答案：A
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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
答案：A