第 1 题 · 六级
Playing chess improves cognitive skills, which the teacher proves with simple experiments.
核心词：cognitive ˈkɒɡnətɪv adj. 认知的
下棋能提高认知能力，老师用简单的实验来证明。
一般现在时动名词主语 + 主谓宾 + which 从句短语 cognitive skills短语 cognitive development
Playing chess improves ___ skills, which the teacher proves with simple experiments.
第 2 题 · 六级
The stadium was built as a sports arena, which the city now uses for concerts as well.
核心词：arena əˈriːnə n. 竞技场，表演场地
这座体育场最初是作为竞技场修建的，如今城市也用它来办音乐会。
一般过去时被动语态 + 介词短语 + which 从句短语 a sports arena短语 a political arena
The stadium was built as a sports ___, which the city now uses for concerts as well.
第 3 题 · 六级
She asserted that the data were correct, which the committee asked her to prove.
核心词：assert əˈsɜːt v. 断言，坚称
她坚称数据是正确的，委员会要求她拿出证据。
一般过去时主谓 + that 宾语从句 + which 从句 + ask sb to do短语 assert that短语 assert oneself
She ___ that the data were correct, which the committee asked her to prove.
