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There used to be a lot of cheetahs. (反意疑问句)
There used to be a lot of cheetahs, _________ _________ ?
答案:usedn't$didn't;there
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题目内容
句型转换
There used to be a lot of cheetahs. (反意疑问句)
There used to be a lot of cheetahs, _________ _________ ?