◎ 题干
The biggest problem for most plants, which _____ just get up and run away when threatened, is that animals
like to eat them.
[     ]
A. shan't
B. can't
C. needn't
D. mustn't
◎ 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“The biggest problem for most plants, which _____ just get up and run away when threatened, is that animals like to eat them. [ ]A. shan'tB. can't C. needn'…”主要考查了你对  【情态动词】  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。