句子改成被动语态 people have used paper and printing for ages

句子改成被动语态 people have used paper and printing for ages 将主动句改为被动People have used paper and prining for ages. paper and printing havebeen used for ages翻译 -Paper and painting have been used for ages.-___.A.Good job people have alrady made preparations for the test改成被动语态 把句子改成被动语态People oughtn't to criticize her so severely for su 句子改成被动语态 i have bouyht some books for my brother 把下列句子改成被动语态：I have learned English for about two years 句子改成被动语态 people in england speak english 英语句子改成被动语态, 几个句子改成被动语态. 英语被动语态.将下列句子变为被动语态,每空一词.1.people used teapots（茶壶） to make te