Many people believe robots will do most of our housework in the future.A. thatB. ifC. why

问题补充：

Many people believe robots will do most of our housework in the future.

A. that

B. if

C. why

D. how

答案：

(答案→)A. that

B. if

C. why

D. how

解析：此题考查的是含有宾语从句的复合句，根据题意只能用that来引导。