第 1 题 · 四级
I did trip him, but it was not intentional, which the coach believed.
核心词：intentional ɪnˈtenʃənl adj. 故意的
我确实绊倒了他，但不是故意的，教练相信这一点。
一般过去时强调助动词 did + but 转折 + which 从句短语 an intentional act短语 not intentional
I did trip him, but it was not ___, which the coach believed.
第 2 题 · 四级
As the sky lightened, we were able to see where we were, which made us feel relieved.
核心词：lighten ˈlaɪtn v. 照亮，使明亮
天色渐亮，我们看清了身处何地，感到如释重负。
一般过去时as 时间状语从句 + be able to do + where 宾语从句短语 lighten up短语 the sky lightened
As the sky ___, we were able to see where we were, which made us feel relieved.
第 3 题 · 四级
The doctors expect the patient’s condition to worsen, which has worried his family.
核心词：worsen ˈwɜːsn v. 使恶化
医生预计病人的情况会恶化，这让家人很担心。
现在完成时expect sb/sth to do + which 从句（现在完成）短语 worsen短语 a worsening situation
The doctors expect the patient’s condition to ___, which has worried his family.
