How long ________ they ________ (dig) the ditch?
have … been digging
暂无解析
Thefloordoesnotlooksobadwhen________(sweep)clean.
Iwishyou________likethat.
ComradeLi________beinBeijingbecauseIsawhimintownonlyafewminutesago.
You________gonow.It’sgettinglate.
Wooddoesnotconductelectricity;________.