________ (fail) several times, they need some encouragement.
Having failed
暂无解析
Thistest________anumberofmultiplechoicequestions.
heteachertoldthemsincelight________(travel)fasterthansound,lightning________(appear)togobeforethunder.
Heaskedmewhethermybrother________(fly)toBeijing.
Night________(fall),wehurriedhome.
Hotmetal________asitgrowscooler.
