________(fail)severaltimes,theyneedsomeencouragement.

Ipreferthisdiagram________thatone.

Agreatnumberofsmallpowerstations________(setup)intheircounty sinceliberation.

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

________(catch)intherain,hewaswettotheskin.