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He _______ a lot of time on research ______ agriculture.A spent into B spent of
人气:140 ℃ 时间:2019-12-12 22:49:54
解答
①He spent a lot of time on research into agriculture.他花了许多时间在农业研究上.
②He spent a lot of time on research of agriculture.他花了很多时间研究的农业.
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