the environment is being sacrificed for economic d

网友回答

is being done 表达的是进行时的被动语态,例如：
The house is being repaired 房子正在被修理
These trees are being watered 树正在被浇水
======以下答案可供参考======
供参考答案1:
be being done是被动语态的进行时，前面的be可以根据主语的不同，时态的不同变化，而后面的being 则不可以。表示“正在被……”
The answer is being typed. 答案正在被编辑。
The position is being translated. 文章正在被翻译。
……