My parents moved out of their old home sometime last year after they had celebrated their 50th year there.

A．anniversary

B．years old

C．age

D．wedding

项目地区长远、可持续发展目标的核心是项目的( )。

A．环境生态影响和社会影响
B．经济和政治影响
C．自然和人文影响
D．利益和期望影响