A. by keeping its original shape and color B. in the life of the cut flower C. tO produce carbon dioxide D. for as l

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问题     A. by keeping its original shape and color
    B. in the life of the cut flower
    C. tO produce carbon dioxide
    D. for as long as possible
    E. by controlling temperature
    F. to replace the water and solution every day
A few simple facts will help you keep cut flowers ______.

选项

答案D

解析 本句出现在文章第1句:“虽然每个人都喜欢在家里放置新鲜的插花,但是很少有人知道如何长时间地保鲜。”
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