You must have been hungry.读快了为什么听不出have呢

You must have been hungry.读快了为什么听不出have呢 A.must be B.may have been C.can have been D.could be ,为什么呢, You must have been really different then. 关于must have been MUST have been done must have been must have/ must have been的区别 must have been done must have done It must have been they who gave the signal.为什么是they而不是them呢? 英语翻译1.you must have used...2.you must have been used...3.you you must have been driving at seventy miles an hour为什么要用ing how long have you been in china中为什么要用have呢?