ther staff ____to wear uniforms in the office 为什么用are asked

题目

ther staff ____to wear uniforms in the office 为什么用are asked

答案

be asked to do sth 被要求做某事
The staff are asked to wear uniforms in th office.
意思是：员工们在办公室要穿工作服.
uniforms 是复数,因此 the staff 这里代指复数,系动词用are