第 1 题 · 六级
The army launched a sudden assault on the fort, which the defenders had not expected at all.
核心词：assault əˈsɔːlt n. 攻击，袭击
军队对堡垒发动突然袭击，守军完全没有预料到。
过去完成时主谓宾 + 介词短语 + which 从句（过去完成否定）短语 launch an assault短语 a sudden assault
The army launched a sudden ___ on the fort, which the defenders had not expected at all.
第 2 题 · 六级
The mountain village uses thermal energy for heating, which the villagers have enjoyed for years.
核心词：thermal ˈθɜːml adj. 热的，热量的
山村用热能取暖，村民们已享用多年。
现在完成时主谓宾 + 介词短语 + which 从句（现在完成）短语 thermal energy短语 thermal insulation
The mountain village uses ___ energy for heating, which the villagers have enjoyed for years.
第 3 题 · 六级
She was wearing red lipstick at the party, which her friends praised all evening.
核心词：lipstick ˈlɪpstɪk n. 口红，唇膏
她参加派对时涂着红色唇膏，朋友们整晚都在称赞。
过去进行时过去进行时 + 介词短语 + which 从句短语 red lipstick短语 put on lipstick
She was wearing red ___ at the party, which her friends praised all evening.
