问题补充：
The teachers us their children.
A. regard as
B. regard into
C. change into
D. change as
答案：
(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。
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