一、根据句意和语境,选词填空。
1. —What's wrong with you?
— I have a toothache.
—You (shouldn't/ couldn't) eat too much candy.
2. The rule says we (needn't/ mustn't) eat snacks in the classroom.
3. —Could I borrow your book?
—Of course you (must/ can).
4. —Dad,must I come back from Grandpa's house today?
—No,you (mustn't/ needn't). You (must/ can) stay there for another
two days.
5. When the traffic light is red,everyone (must/ may) stop and wait.
6. The book (must/ can) be Lucy's. We can see her name on the cover.
7. —Would you like to go cycling with me?
—I'm afraid I (can't/ couldn't). I have to do my homework first.
8. —Where's Zhao Hai? I can't find him.
—I'm not sure. He (may/ must) be in the library. He is preparing for the exam.
9. —Must we go to see a doctor when we have a bad cold?
—Yes,we (must/ should).
10. —I can't sleep well these days. What should I do?
—You (should/ may) go to bed early. You (shouldn't/ couldn't)
drink tea or coffee in the evening.

1. shouldn't
2. mustn't
3. can
4. needn't; can
5. must
6. must
7. can't
8. may
9. must
10. should; shouldn't

1. 语境为牙疼后给出建议，shouldn't表示“不应该”，符合建议语气；couldn't侧重能力上不能，不符合语境。
2. rule（规定）提示此处是禁止行为，mustn't表示“禁止，不准”，符合；needn't表示“不必”，不符合。
3. Could I...是委婉请求，肯定回答用can，无需用must。
4. must引导的一般疑问句，否定回答用needn't（不必）；第二空表示“可以”，can符合语境。
5. 交通红灯时需强制停下，must表示“必须”，符合规则要求；may表示“可能”，不符合。
6. 根据“封面有名字”是肯定推测，must be表示“肯定是”，符合语境。
7. 此处是现在语境下的委婉拒绝，用can't表示“不能”；couldn't是过去式，不符合当前语境。
8. 根据“I'm not sure”是不确定的推测，may表示“可能”，符合；must是肯定推测，不符合。
9. must引导的一般疑问句，肯定回答用must。
10. 第一空是给出建议“应该早睡”，should表建议；第二空是建议“不应该”晚上喝茶或咖啡，shouldn't符合语境，couldn't不符合。

二、用适当的反身代词填空。
1. Zhao Ming and Zhou Liang enjoyed in Beijing last year.
2. The boy taught English at home when he was young.
3. The box is too heavy. Li Mei can't carry it by .
4. I often wash my clothes by .
5. His name is James,but he usually calls Jim.
6. —Help to some chicken,kids.
—Thanks.
7. —Look at that poor little cat.
—Yes,it hurt when it fell off the tree.
8. Helping others is helping .
9. Be careful! Don't play with a knife. You may hurt .
10. I think all the students should learn to take care of .

1. themselves；2. himself；3. herself；4. myself；5. himself；6. yourselves；7. itself；8. ourselves；9. yourself；10. themselves

本题考查反身代词的用法，需结合句子主语和相关固定搭配来选择对应反身代词：
1. 主语Zhao Ming and Zhou Liang是复数第三人称，"enjoy oneself"是固定短语“玩得开心”，故填themselves；
2. 主语The boy是单数男性第三人称，"teach oneself"是固定短语“自学”，故填himself；
3. 主语Li Mei是单数女性第三人称，"by oneself"是固定短语“独自”，故填herself；
4. 主语为I，对应的反身代词是myself，"by myself"表示“独自”，故填myself；
5. 主语为he，"call oneself"是固定表达“自称”，故填himself；
6. 答语中的kids是复数，"help oneself to sth."是固定短语“随便吃/用某物”，对应复数反身代词yourselves；
7. 主语it指代猫，"hurt oneself"是固定短语“伤到自己”，故填itself；
8. 句意为“帮助别人就是帮助自己”，此处指代说话者及听者群体，故填ourselves；
9. 主语You为单数第二人称，"hurt oneself"表示“伤到自己”，故填yourself；
10. 主语all the students是复数第三人称，"take care of oneself"是固定短语“照顾自己”，故填themselves。