they had the pet as their family member.(同义句转换）they had the pet as their family member.(同义句转换）they ____the pet ____their family member.

they had the pet as their family member.(同义句转换）they had the pet as their family member.(同义句转换）they ____the pet ____their family member.
they had the pet as their family member.(同义句转换）
they had the pet as their family member.(同义句转换）
they ____the pet ____their family member.

they had the pet as their family member.(同义句转换）they had the pet as their family member.(同义句转换）they ____the pet ____their family member.
regarded as 把…认作,把...视为.