the robots have been sent to repair the damaged nuclear power station in Japan
题目
the robots have been sent to repair the damaged nuclear power station in Japan
It was the first time that the robots __have been sent____________ to repair the damaged nuclear power station in Japan.横线处为什么用现在完成时?
横线处改为 had been sent
不好意思打错了
答案
举一反三
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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