钢铁炼钢工艺长流程:His grandfather ___for thirty years.

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Adied Bwas dead Chas been dead Dhas died
解释一下原因

His grandfather ___for thirty years.
选C：has been dead
for thirty years,决定了用完成时态，dead：死的，表示一种延续性状态，与系动词be的完成时态been连用，die是暂短性动词，不可以用。

C has been dead
由于有For 所以又是一种持续状态

c
died是一个瞬间动词，不能延续
so用它的形容词形式dead

C has been dead

有 for 表时间的句子宜用现在完成时.

His grandfather ___for thirty years. 1.His grandfather always ______ him funny stories. A.says Btalks C.speaks D.tells great grandfather 是什么意思? grandfather principle 是什么意思？指什么？寻Grandfather's Clock 伴奏帮忙翻译一下歌词英文：Grandfather’s clock Sometime I can play the chess with my grandfather . grandfather's clock(古老的大钟)的谱子 HIS官方网站 His face showed _________ his conflicting emotions.