他们决定砍掉后院那棵死松树。

They decided to ___chop ___down the dead pine tree in their backyard.

公司计划为开发砍伐几英亩的森林。

The company plans to ___chop ___down several acres of forest for development.

为了修建新路，他们不得不砍伐数十棵古树。

In order to build the new road, they had to ___chop ___down dozens of ancient trees.