许多家庭周末会一起去公园野餐。

Many ___families go to the park for picnics together on weekends.

这个家族可以追溯到五百年前的共同祖先。

The ___families can trace their roots back to a common ancestor from 500 years ago.

这些语言属于同一个语系，共享相似的语法结构。

These languages belong to the same ___families, sharing similar grammatical structures.

猫科动物包括家猫和老虎等物种。

The ___family Felidae includes species like domestic cats and tigers.