【解答】The car is running ______ 50miles an hour.A in ; B with ; C by ; D at
【分析】这道题目考察介词的用法.以某一个时速前进,用介词at,强调就在那个数值上,比较精
确.
【翻译】这辆车以时速50英里前进.
【答案】D
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