Hardly had he finished his speech ________ the audience started cheering.
B
暂无解析
Somemoleculesarelargeenough________(see)undertheelectronicmicroscope.
Thefloordoesnotlooksobadwhen________(sweep)clean.
Those who’d like to visit the exhibition ________ (sign) your names here.
The floor does not look so bad when ________ (sweep) clean.
________ (fail) several times, they need some encouragement.