◎ 题干
You have already tried your best so you _____ worry about the matter.
[     ]
A. can't
B. needn't
C. mustn't
D. couldn't
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据魔方格专家分析,试题“You have already tried your best, so you _____ worry about the matter. [ ]A. can't B. needn't C. mustn't D. couldn't …”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。