Question

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he often talks adout the river that runs through the eity.拆分复合句

Answer 1

答案：He often talks about the river. The river runs through the city.
解析：该句是一个主从复合句，that及其后面的内容构成river的定语，属定语从句。像这种句式，拆分时去掉引导词（本句中是that），再添上前一句的宾语作主语即可。