1 . 他们一定是在森林里迷路的孩子；否则，他们就会按计划去湖边露营了。
They________________ the children lost in the woods; otherwise, they would have been at the lakeside camp as scheduled.
They
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2 . 她断定他准是把包落在火车上了。
She reasoned that she________________ on the train.
She reasoned that she
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23-24高一上·全国·课后作业
3 . ________________ (肯定有人打开了笼子). The dog couldn’t have escaped on its own. (根据汉语提示完成句子)
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4 . 我的姐姐回家时满脸笑容。她一定通过驾照考试了。(情态动词 + have done)
My sister came home with a broad smile on her face. She____________________________ .
My sister came home with a broad smile on her face. She
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2023-09-12更新
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24次组卷
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2卷引用：Unit 6 The Media Lesson 2 课后练-2022-2023学年高中英语北师大版（2019）选择性必修第二册
5 . 你很熟悉这个城市，你一定在这里待了很长时间。(must)
You are very familiar with the city; you________ here for a long time.
You are very familiar with the city; you
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6 . You_______________ (一定有过一些时刻) when you were disappointed. （“must have done sth ”意为“一定做过某事”）
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7 . They _____________________ (一定意识到) that we were totally helpless, for after a few moments, they wandered over and pushed us free. (根据汉语提示完成句子)
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8 . 他肯定是受到了惩罚，因为他今天不高兴。
He__________________ for he is upset today .
He
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9 . 我们一定是走错路了，因为道路变窄了。(must have done)
________ , because the road became narrow.
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10 . 既然没有人帮助他, 他一定是独自完成了这项研究。(must have done)
Since nobody gave him any help, he________ .
Since nobody gave him any help, he
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