With efforts conservation, we may believe that people enjoy a healthy life without the environment around them .
A. focused on; suffering
B. focusing on; suffering
C. focused on; being suffered
D. focusing on; suffered
网友回答
A. focused on; suffering
B. focusing on; suffering
C. focused on; being suffered
D. focusing on; suffered
解析：
focus efforts on sth致力于… 宾语efforts提前，故用被动形式，构成with sth done结构。 同理构成without sth being done.without后接现在分词形式的被动。