His grandfather diedDecember 12th ,1980.A：at B:on C:in
題目：
His grandfather died()December 12th ,1980.A：at B:on C:in
解答：
B
請及時採納,多謝!
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題目：
His grandfather died()December 12th ,1980.A：at B:on C:in
解答：
B
請及時採納,多謝!
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