many families ____ ____ ____ ____ (把他们的宠物当作) their family members

many families ____ ____ ____ ____ (把他们的宠物当作) their family members
many families ____ ____ ____ ____ (把他们的宠物当作) their family members

many families ____ ____ ____ ____ (把他们的宠物当作) their family members
took/regarded their pets as
take ..as
= regard ..as
把..当作..

regard as 把...视为
many families regard their pets as their family members.
例句：I regard him as my brother.
我把他当作兄弟。
希望对楼主有帮助！