It’s quite obvious that the aging population in China will cause _____heavy pressure on _____whole society in the future.

A．/, the

B．the, /

C．a, the

D．a, a

学校对个体性别角色社会化发生重要影响的渠道主要有（）

A.教科书

B.教师

C.同伴群体

D.校长

E.校园气氛