The boss often makes him work for 12 hours a day.转换为被动语态

He is often made to work by the boss for 12 hours a day.
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再问： Today people use computers in both cities ang towns.转换为被动语态 A letter is written to my parents by me once a morth.转换为主动语态
再答： Computers are used by people today in both cities ang towns. I write a letter to my parents once a month