They are planting trees on the mountain.

他们在山上植树。

youdao

They are planting trees. They are helping to make our city beautiful.

他们在植树。他们在帮助美化我们的城市。

youdao

They are planting some young trees now.

他们正在栽一些小树。

youdao

They are busy planting trees on the hill.

他们正忙着在山上植树。

youdao

They are busy planting trees on the hill.

他们正忙着在山上植树。

youdao