Question

【题目】After ____ seemed about a quarter, Li Lin managed to work out the difficult math problem, which pleased our teacher.

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

Answer 1

【答案】C

【解析】

考查介词的宾语从句。句意：大约过了一刻钟，李林终于解出了这道数学题，老师很高兴。介词after（在---之后）后面是宾语从句，从句没有引导词，且没有主语，所填词应该其双重作用，故答案为C。