I __the Great Wall when I__in China two years ago. A saw was B have seen was C saw:have been
题目
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
答案
A saw was
when I,因此是过去时而不是完成时.
saw sth.
was in China
A.
举一反三
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我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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