Theletter________.Ishouldhaverecei

发布时间：2020-07-26 03:20:09

The letter ________. I should have received it this morning.A.is to be mailedB.has been mailedC.had been mailedD.was being mailed

网友回答

B
以上问题属网友观点，不代表本站立场，仅供参考！