Botanists are not sure where the first plant was grown or even _______. ( 章节：1 难度：4)_做题室

单项选择题Botanists are not sure where the first plant was grown or even _______. ( 章节：1 难度：4): A、what plant was; B、it was what plant; C、what plant was it; D、what plant it was

正确答案：D
答案解析：
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