The train was moving to the south of 150 miles an hour. [ ] A.at a speedB.on the
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![The train was moving to the south of 150 miles an hour. [ ] A.at a speedB.on the](/pic/43_997635.jpg)
The train was moving to the south ________ of 150 miles an hour.
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A.at a speedB.on the speedC.at the speedD.at speeding试题答案
答案:A