题目内容
26. Many experts believe that the Internet of Things will ________ the next industrial revolution.
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27. You should _______ some steps to help maintain a healthy indoor air environment.
28. Believe it or not, you can find many ways to save money while ________ in an expensive area.
29. We went to the museum only ________ it was closed that day.
30. If you want to buy these new devices, you should be clear about ________ they can offer.
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