________Mr.Black________gotowo

发布时间：2020-07-28 16:01:49

________ Mr. Black ________ go to work by ferry before the bridge was built?A.Did; used toB.Use; toC.Did; use toD.Does; use to

网友回答

C解析used to do的疑问式，可以是Used+主语+to do？或Did+主语+use to do？
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