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】固定句型：Thereason why…．is that…：…的原因是…，why引导的是定语从句，在从句中担任原因状语。