What role _________ playing in the new project?

What role _________ playing in the new project?
A、is the engineers
B、are the engineers
C、the engineers is
D、the engineers are
【正确答案】：B
【题目解析】：特殊疑问句的结构为：疑问词+谓语动词+主语+其他；主语是engineers，谓语动词要用复数。