所谓整句还原法，即指通过分析题干所提供的情景或句子结构，将命题者省略的部分补充完整，然后再根据完整的句子进行分析和答题。如：
1. “What were you trying to prove to the police?”  “_____ I was last night.”
A. That             B. When              C. Where                D. What
分析：此题应选 C，其余三项均有可能误选。做对此题的关键是要明确答语部分为省略句，若将其补充完整，即为：I was trying to prove to the police where I was last night. 其中where 引导的是一个宾语从句。