We must take measures to protect the environment from A. pollutingB. being polluted C. po

问题补充：

We must take measures to protect the environment from ．

A. polluting

B. being polluted

C. polluted

D. pollute

答案：

A. polluting

(答案→)B. being polluted

C. polluted

D. pollute

解析：考查固定句型。Protect sb from sth/doing sth保护某人不受…伤害；根据本句意，又使用被动形式。句意：我们必须采取行动保护我们的环境不受污染。