题目

 Children must _______ road safety before they are allowed to ride a bike on the road. A. instruct in                                             B. instruct C. be instructed in                                     D. be instructed 答案：【解析】选C。教导/指示某人(做)某事，用instruct sb. to do sth. 或instruct sb. in sth. ，children与instruct之间是被动关系，所以选C。

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