the robots have been sent to repair the damaged nuclear power station in JapanIt 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
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the robots have been sent to repair the damaged nuclear power station in JapanIt 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
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
the robots have been sent to repair the damaged nuclear power station in JapanIt 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是对的.it was the ,time that 用过去完成时.
事情已经发生,第一次干什么事,用过去时也没问题