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

Hotmetal________asitgrowscooler.

Hardlyhadhefinishedhisspeech________theaudiencestartedcheering.

ComradeLi________beinBeijingbecauseIsawhimintownonlyafewminutesago.

________(catch)intherain,hewaswettotheskin.