I have no letters to be posted now.为什么后面的“to be posted” 为啥用被动啊?不是当不定时修饰want have 等动词的宾语,句子的主语是不定时的逻辑主语时,用主动语态表示被动含义么?

But i have no letters to be posted now为什么用to be posted Have you written these letters?No,____ time to do my other work yet.A:I have had hardly B:I have hardly had C:I hardly have had D:Hardly I have had Have you written these letters?No,____ time to do my other work yet.A：I have had hardly B：I have hardly had C：I hardly have had D：Hardly I have had 16.Have you written these letters?No,____ time to do my other work yet.A：I have had hardly B：I have hardly had C：I hardly have had D：Hardly I have had I have to read letters written in pencil I have a huge pile of letters to _____ with. I have a huge pile of letters to d_____ with. i have no time to I have no words to i have no more to I have no word to I have no way to I have no more letters to_____,thank you.A.type B.be typed I have letters to write.能不能说成I have some lettersto write. I have some letters to be typed和I have some letters to type 那个是当事人我做的那个是叫别人做的? i have no feeling to you, i have no time to talk with I have no time to waste`!