Living things are dying out quickly. Let’s ask destroying them in the past years

Living things are dying out quickly. Let’s ask ____ destroying them in the past years.

       A. what part people have been playing

       B. people have played in

       C. what part people have played in

       D. people have been playing what part

试题答案

C                       

解析:

宾语从句中要用陈述句的语序。