第 1 题 · 四级
The submarine that dived into the deep sea was carrying secret equipment.
核心词：submarine ˌsʌbməˈriːn n. 潜水艇
潜入深海的潜艇载着秘密设备。
过去进行时that 定语从句 + 过去进行时 was carrying短语 a nuclear submarine短语 a submarine cable
The ___ that dived into the deep sea was carrying secret equipment.
第 2 题 · 四级
It is the economic crisis that will deepen the gap between the rich and the poor.
核心词：deepen ˈdiːpən v. 加深，加剧
正是经济危机将加深贫富差距。
一般将来时强调句 It is…that…短语 deepen the gap短语 deepen the reform
It is the economic crisis that will ___ the gap between the rich and the poor.
第 3 题 · 四级
The mistress of the house welcomed the guests warmly, although she was very tired.
核心词：mistress ˈmɪstrɪs n. 女主人
女主人热情地迎接客人，尽管她很累。
一般过去时although 让步状语从句短语 the mistress of the house短语 welcome warmly
The ___ of the house welcomed the guests warmly, although she was very tired.
