单选题 The reason that many of homemakers buy kitchen appliances (厨房用品) is that they want to do their tasks in a shorter length of time.
A. that
B. many of homemakers
C. that
D. in a shorter length of time.

【正确答案】 A
【答案解析】应改为why。固定句型：The reason why…is that……的原因是……，why引导的是定语从句，在从句中作原因状语。