If there were no automatic washing machines, people would have to wash their clothes hand or hand-operated machines.
A. by; by
B. with; with
C. on; with
D. by; with
网友回答
A. by; by
B. with; with
C. on; with
(答案→)D. by; with
解析：考察介词搭配。固定搭配by hand用手；手工制作；with machine用机器。句意：如果没有自动化洗衣机，人们就不得不用手或者用手操作的机器来洗衣服。故D正确。