◎ 题干
用 must, oughtn't to, don't have to, mustn't, needn't或  have to填空。
1. You _____ go on working because you look so tired now.
2. The weather turned out to be fine yesterday. I ______ have had the trouble to carry my umbrella
    with me.
3. If you earn more than ~5,000, you _____ pay tax.
4. You ______ play now !  You shall finish your homework first!
5. You can't give up. You ______ try to get over the difficulties.
◎ 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“用must,oughtn'tto,don'thaveto,mustn't,needn't或haveto填空。 1. You_____ go on working because you look so tired now.2. The weather turned out to be fine y…”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。