Wood does not conduct electricity; ________.
C
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Iwonderifhecouldgetit________(do)beforetomorrow.
Onlywhenyouhaveobtainedsufficientdata________cometoasoundconclusion.
Abeamoflightwillnotbendroundcornersunless________(make)todosowiththehelpofareflectingdevice
Agreatnumberofsmallpowerstations________(setup)intheircounty sinceliberation.
heteachertoldthemsincelight________(travel)fasterthansound,lightning________(appear)togobeforethunder.