【题目】I want to use the same tools________ used in your factory a few days ago.
A.as was
B.which were
C.as were
D.which

【答案】D
【解析】考查as引导的定语从句。句意：我想用那些几天前在你们工厂使用的那些工具。as引导定语从句时通常构成such…as或the same…as固定搭配，其中such和same修饰其后的名词，as为关系代词，指代其前的名词引导定语从句。as在从句中可以作主语、表语或宾语。本题中as作从句的主语。故选C。