◎ 题干

You can not imagine the difficulty they had ____ the problem. It isn’t ____ easy.
A.to solve; soB.solved; soC.solving; thatD.solved; that
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“You can not imagine the difficulty they had ____ the problem. It isn’t ____ easy.A.to solve; soB.solved; soC.solving; thatD.solved; that…”主要考查了你对  【therebe句型】  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。