Question

【题目】When you get your paper back, pay special attention to________ have been marked.

A. where B. which C. what D. that

Answer 1

【答案】C

【解析】根据语境可知，此处表示对论文中有标注的地方要特别注意。pay special attention to后需接宾语，同时宾语从句中缺少主语，故用what。what相当于the things that，既能引导宾语从句，又能充当宾语从句的主语，故C项正确。