Asmiddleschoolstudents

发布时间:2020-07-15 15:19:55

As middle school students, we _____ the police to keep order.A.are used to helpB.used to helpingC.used to helpD.used to be helped

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C解析used to do sth. 过去常常做…;be used to doing sth.习惯语做…。
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