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1、when flint ___to the market, these products enjoyed great success.A、introducing B、introduced C、introduce D、being introduced答案是B,不得要领!我觉得应该用被动语态。introduce 有主动表 被动的用法吗?不知各位有何见解?
Leaves are to the plant____ lungs are to the animal.A.that isB.thatC.whatD.which找不到思路!解释请具体点哦!!
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