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英语
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the experiment may take a few days to finish,but it's worth__it.
A.carring out B.sustaing C.devoting D.keep at
答案怎么回是D?be worth +doing的不是么?
人气：469 ℃ 时间：2019-10-24 13:52:56
解答
是的,答案错了.
书有问题.
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