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By the time she was fifteen,Kitty ( )(teach)herself a foreign language,是has taught 还是had啊?

分类: 作业答案 • 2022-01-09 18:03:27

问题描述：

By the time she was fifteen,Kitty ( )(teach)herself a foreign language,是has taught 还是had啊?

答

had taught.过去完成时,表示的动作发生在过去的过去