第 1 题 · 高考
The doctor ordered a scan of his head, which showed no serious problem.
核心词：scan skæn n. 扫描
医生让他做了头部扫描，结果显示没有严重问题。
一般过去时which 定语从句短语 a brain scan短语 a full scan
The doctor ordered a ___ of his head, which showed no serious problem.
第 2 题 · 高考
The conductor of the train checked our tickets, which was very polite and kind.
核心词：conductor kənˈdʌktə n. 售票员，列车员
列车员检查了我们的票，非常有礼貌和友善。
一般过去时which 定语从句短语 a train conductor短语 an orchestra conductor
The ___ of the train checked our tickets, which was very polite and kind.
第 3 题 · 高考
The book explains the history of communism, which is part of world history.
核心词：communism ˈkɒmjunɪzəm n. 共产主义
这本书讲解共产主义的历史，它是世界历史的一部分。
一般现在时which 定语从句短语 communism短语 the history of
The book explains the history of ___, which is part of world history.
