1 . Machines ________________ (使人们……成为可能) do more work with less time. (根据汉语提示补全句子)
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2 . The headmaster has made _________ clear that the meeting will not be put off. (用适当的词填空)
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3 . 微笑可以打破隔阂是一个普遍真理。(break down barriers)
It is a universal truth________ .
It is a universal truth
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