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通过各种形式的练习，帮助学生巩固本单元所学重点词汇以及句型、语法，体会其在具体语境中的含义及用法，抓好基础，回归教材。
一、根据句意, 按要求完成句子。
1. You must be careful with your handwriting. (改为祈使句)
_____ _____with your handwriting.
2. Talk and read loudly in class.
(改为否定句)
_____ _____and read loudly in class.
3. The girl singing in the next room must be Lucy. (改为否定句)
The girl singing in the next room_____ _____Lucy.
二、根据句意, 用could, must or mustn’t填空。
1.It is dangerous. You_____keep out!
2.These stairs are not safe. You_____use them.
3.The rocks are falling down. You_____get hit.
4.The river is too deep. You_____swim in it.
5.Betty_____know what to do because she did some basic medical training.
三、根据上下文意思，在空白处填入合适的单词。
Information is coming in that there could be__1__because of heavy rain in the north. The government is__2__people about falling rocks. Some roads have a lot of rocks on them, but people are trying to__3__them quickly. In some places there is no__4__. And people must stay__5__to keep away from falling rocks.
四、根据所给汉语完成翻译。
1. 请举起你的右手。
2. 不要在课堂上大声说话。
3. 咱们一起上学去吧。
4. 请来两块面包。
5. 再不要这样做了。
参考答案
一、1.Be careful 2.Don’t talk 3.can’t be
二、1.must 2.mustn’t 3.could 4.mustn’t 5.must
三、1.trouble 2.warning 3.clear 4.power 5.inside
四、1.Please put up your right hand.
2.Don’t talk loudly in class.
3.Let’s go to school together.
4.Two pieces of bread, please.
5.Don’t/Never do that again.
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