题目内容
John spent a lot of time ______ to his collegues how challenging the project was.
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The company is looking for a well-organized and ______ secretary to assist the HR Manager.
The most important form of energy is electric energy, which is ______ used in our daily life.
In the smart cities, communication will be ______ than it is today via digital technology.
Electric vehicles will save a lot of air ______ because there will be no emission of CO2 in the air.
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