手机APP：Toeic Practice
单元：Practice 7_130
题目：
Any concerns regarding your natral gas appliances should be directed
to the manufacturer-retailer ___ which you purchased the natural gas
appliance.
(A) on
(B) for
(C) from
(D) in
疑问：为什么是C而不是D

简单死了 我3秒就过了