他是一位独自抚养孩子的单亲家长。

He's a single parent raising a ___family on his own.

保罗和艾莉森希望很快能要孩子。

Paul and Alison are hoping to start a ___family soon.

有些人想要孩子是因为他们想为人父母。

Some people want to have a ___family because they want to be parents.