Abeamoflightwillnotbendroundcornersunless________(make)todosowiththehelpofareflectingdevice
我国社会主义改造全面推开是从_______年开始的。
________theconcerthadbegundidwerealizewhatasplendidshowitwasgoingtobe.
Agreatnumberofsmallpowerstations________(setup)intheircounty sinceliberation.
Becareful,_______you'llfalldown.
