单选题 The symbols of mathematics ______ we are most familiar are the signs of addition, subtraction, multiplication, division arid equality.
A. to which B. which C. with which D. in which

【正确答案】 C

【答案解析】该题测试词组的用法和句前带介词的从句用法。本题be familiar with词组中的介词 with移到which引导的we are most familiar从句前。familiar之后既能接with，也能接 to。familiar with指人对某人或事物熟悉，主语是有生命的名词；familiar to指某件事情对某人来讲熟悉，主语是无生命的名词。既然从句的主语是we，所以必须用with。