第 1 题 · 高考
The choir sang a carol, which filled the church with joy.
核心词：carol ˈkærəl n. 圣诞颂歌
唱诗班演唱圣诞颂歌，让教堂充满欢乐。
一般过去时fill with + which 定语从句短语 a carol短语 sing carols
The choir sang a ___, which filled the church with joy.
第 2 题 · 高考
The form asks for your name and sex, which is used for the record only.
核心词：sex seks n. 性别
表格要求填写姓名和性别，仅用于登记。
一般现在时ask for + 被动语态短语 name and sex短语 the male sex
The form asks for your name and ___, which is used for the record only.
第 3 题 · 高考
The plan is unchangeable now, which everyone must follow strictly.
核心词：unchangeable ʌnˈtʃeɪndʒəbl adj. 不可改变的
计划现在不可更改，每个人都必须严格遵守。
一般现在时must do + which 定语从句短语 an unchangeable rule短语 unchangeable facts
The plan is ___ now, which everyone must follow strictly.
