Abeamoflightwillnotbendroundcornersunless________(make)todosowiththehelpofareflectingdevice

Herefusedtotelluswhetherhe________(undertake)thejob.

heteachertoldthemsincelight________(travel)fasterthansound,lightning________(appear)togobeforethunder.

Ifound________toanswerallthequestionswithinthetimegiven.

Ipreferthisdiagram________thatone.