第 1 题 · 六级
The prevalence of the disease has increased in recent years, which the doctors have studied closely.
核心词：prevalence ˈprevələns n. 流行，普遍
近年来这种疾病的流行率上升了，医生们对此进行了深入研究。
现在完成时现在完成时 + 时间状语 + which 从句（现在完成）短语 the prevalence of短语 the prevalence rate
The ___ of the disease has increased in recent years, which the doctors have studied closely.
第 2 题 · 六级
The smoke from the kitchen activated the fire alarm, which the whole building heard immediately.
核心词：activate ˈæktɪveɪt v. 激活，触发
厨房的烟雾触发了火警，整栋楼立刻听到了警报。
一般过去时主谓宾 + 介词短语 + which 从句短语 activate an alarm短语 activate a device
The smoke from the kitchen ___ the fire alarm, which the whole building heard immediately.
第 3 题 · 六级
The refugees lived in misery for many years, which the reporters described in heart-breaking detail.
核心词：misery ˈmɪzəri n. 痛苦，悲惨
难民们多年来生活在苦难中，记者们用令人心碎的细节描写了这一切。
一般过去时主谓 + 介词短语 + 时间 + which 从句短语 live in misery短语 human misery
The refugees lived in ___ for many years, which the reporters described in heart-breaking detail.
