◎ 题干
—I wonder why the thinnest plastics bags, though ________ , are still in use here.
—Well, it’s no easy job to solve this problem effectively.
A.banningB.bannedC.to banD.having banned
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“—I wonder why the thinnest plastics bags, though ________ , are still in use here.—Well, it’s no easy job to solve this problem effectively.A.banningB.bannedC…”主要考查了你对  【现在分词的被动式】【现在分词】【不定式的被动式】【过去分词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。