用被动语态改写这些句子,省略括号部分的单词
用被动语态改写这些句子,省略括号部分的单词
1(people) keep all the books in good order in the library2(the federal goverment )graduated the income tax from 14 to 70 prcent in the 1960's3(the advertising )can sometimes persuade us to buy tings that are not necessary4what shuould (one) do in acase like this?5(they )have announced that they will invite only three of us to the party