他轻轻地把地图平铺在桌上。

He gently ___laid down the map on the table.

学校制定了新的行为准则。

The school ___laid down a new code of conduct.

消防员们随时准备为救人而献出生命。

Firefighters are always ready to ___lay down their lives to save others.

母鸡在窝里下了几个蛋。

The hen ___laid a few eggs in the nest.