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
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
【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。