New technology ______ to make sure that the cars, taxis, bus
ray19492022-10-04 11:39:541条回答
New technology ______ to make sure that the cars, taxis, buses and trains we use ______ the air.
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- 欧阳朔 共回答了15个问题
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本题主要考查动词的时态及语态的应用。第 1 空强调目前所正在进行的一种行为。由于主语是动作的承受者,应该使用现在进行时的被动语态;第 2 空强调一般经常性的行为,应该用一般现在时。因此本题的正确答案选C。 - 1年前
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