The firm has been dismissing experenced staff and ---------- with younger people on lower salaries.
问题描述：
The firm has been dismissing experenced staff and ---------- with younger people on lower salaries.
a.placed them
b.took placed them
c.took their place
d.replaced them
答
d .take sb's place 代替,replace sb with 代替.
虽然同义但主语不同.