He asked me what ___ in China in 1976.横线上填 happened 还是 had happened 说下原因.
问题描述：
He asked me what ___ in China in 1976.
横线上填 happened 还是 had happened
说下原因.
答
had happened
“发生”在“问”之前，过去的过去用过去完成时
答
had happened
答
过去的过去had happened
答
happened
in 1976说明是过去时，所以只要用过去时就好了
答
HAD HAPPENED
HE ASKED ME 已经是过去时态
他问的是1976的中国发生了什么?
所以谓语在“1976的中国”是处于过去的过去时态,因而用HAD HAPPENED!