I __the Great Wall when I__in China two years ago. A saw was B have seen was C saw:have beenD have seen have been

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I__theGreatWallwhenI__inChinatwoyearsago.AsawwasBhaveseenwasCsaw:havebeenDhaveseenhavebeenI__theGrea

I __the Great Wall when I__in China two years ago. A saw was B have seen was C saw:have beenD have seen have been
I __the Great Wall when I__in China two years ago. A saw was B have seen was C saw:have been
D have seen have been

I __the Great Wall when I__in China two years ago. A saw was B have seen was C saw:have beenD have seen have been
A saw was
when I,因此是过去时而不是完成时.
saw sth.
was in China
A.

答案选A saw was
2年前当我在中国的时候,我已经看了长城了。

选B,前面用完成时,后面用过去式

A
两年前当我在中国的时候看到了长城。
two years ago用于过去时

可以先将句子翻译一下,当两年前在中国的时候,我看见长城,不管是在中国还是看长城都是过去的事,和现在没有关系,所以正确答案只能选A,两格都是一般过去式

这里是表示过去的事情,陈述过去发生所以用过去式,不用现在完成 排除 b c d
所以选择A 两年前我在中国的时候,曾经去看过长城
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