Question

The cost of sales makes up a large part of the prices that _____. 

A．are paid for all products

B．all products are paid

C．for which all products are paid

D．for all products paid

Answer 1

A

本题考查的是定语从句，that是引导定语从句的关系代词，指代the prices，在从句中充当被动语态的主语，故C是结构错，D是语态错，pay的搭配是pay the price for，因此for不可省，故B也错。