提问
7月4日

  • 韩语
  • 英语 (美国)
  • 日语
关于英语 (美国) 的问题

The epidemics ended before those treatments "completed" clinical trials.

I can't understand about the word "completed". I think using "complete" instead of "completed" is correct. I hope you explain about this!
回答
[来自HiNative]Hi!正在学习外语的你

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The epidemics ended before those treatments "completed" clinical trials.
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