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Scientists estimate ______ (还要过很多年这种药才能用在人身上). it will be many years before the
Scientists estimate ______ (还要过很多年这种药才能用在人身上). it will be many years before the
游客
2024-06-05
21
管理
问题
Scientists estimate ______ (还要过很多年这种药才能用在人身上).
选项
答案
it will be many years before the medicine can be used on human beings
解析
本题测试句子结构“it+be+时间+before”。
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