When you get your paper back pay special attention to have been markedA. whereB. whatC.

问题补充：

When you get your paper back, pay special attention to have been marked

A. where

B. what

C. which

D. that

答案：

A. where

(答案→)B. what

C. which

D. that

解析：考查宾语从句。 句意：当你拿回试卷的时候，注意被做标记的地方。pay special attention to 做谓语，后面从句做宾语。宾语从句没有主语，此时需要用宾语从句引导词what引导。选B。