Mywalletisnowheretobefound.I_____itwhenIwasonthebus.
D
must have+done 用于推断过去某个时间肯定发生了的事情。
Beingextremely_____tothecold,Idonotlikeskating.
Idon‘tfeellike_____anythingnow.
_____alltherepresentativesstillnotthere,themeetingwaspostponedforseveralhours.
Thedriverpulled_____atthetrafficlights.
Itwasnotuntilshehadfinishedallherwork_____.