第 1 题 · 四级
The light rain dampened the crowd’s enthusiasm, which the organizer regretted.
核心词：dampen ˈdæmpən v. 抑制，使沮丧
小雨使观众热情减退，组织者很遗憾。
一般过去时主谓宾 + which 从句短语 dampen the enthusiasm短语 dampen spirits
The light rain ___ the crowd’s enthusiasm, which the organizer regretted.
第 2 题 · 四级
The slow student lags behind the others, which the teacher tries to fix.
核心词：lag læɡ v. 落后，走得慢
那个学得慢的学生落后于其他人，老师设法解决。
一般现在时主谓 + 介词短语 + which 从句短语 lag behind短语 a time lag
The slow student ___ behind the others, which the teacher tries to fix.
第 3 题 · 四级
The bottle holds two liters of water, which the family drinks every day.
核心词：liter ˈliːtə n. 升（容量单位）
这个瓶子装两升水，全家每天喝。
一般现在时主谓宾 + 介词短语 + which 从句短语 a liter of短语 two liters
The bottle holds two ___ of water, which the family drinks every day.
