書名：國學新多益閱讀題庫解析
版本：2010(淺藍色書皮)
頁數：p.41 151題
題目：
Companies that are targeting this niche have found that products that simply do the job for _____ they were designed are easier to manufacture.
(A) what
(B) where
(C) which
(D) whom
疑問：正確答案是C，為什麼不能用A