The teachers us their children.A. regard as B. regard intoC. change intoD. change as

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(答案→)A. regard as
B. regard into
C. change into
D. change as
解析：regard  as把……视为；change  into   把……变成。选项BD搭配有误。句意：老师们把我们视作他们的孩子。结合语境可知选A。