第 1 题 · 高考
The cold water gave him a strange sensation, which he could not explain.
核心词：sensation senˈseɪʃn n. 感觉，知觉
冷水给他一种奇怪的感觉，他无法解释。
一般过去时which 定语从句短语 a strange sensation短语 a burning sensation
The cold water gave him a strange ___, which he could not explain.
第 2 题 · 高考
They crossed the frontier between the two countries, which took them a whole day.
核心词：frontier ˈfrʌntɪə n. 边境，边界
他们穿越了两国之间的边境，花了一整天。
一般过去时which 非限制性定语从句短语 cross the frontier短语 the frontier of
They crossed the ___ between the two countries, which took them a whole day.
第 3 题 · 高考
The meeting was informal, so everyone wore casual clothes.
核心词：informal ɪnˈfɔːml adj. 非正式的
会议是非正式的，所以大家都穿休闲装。
一般过去时并列句短语 an informal meeting短语 informal language
The meeting was ___, so everyone wore casual clothes.
