Heaskedmewhethermybrother________(fly)toBeijing.
Thedirectorrecommendedthatshe________(study)moreEnglishbeforegoingabroad.
Hefellasleepimmediatelylastnight;hemust________(be)verytired.
Howlong________they________(dig)theditch?
Herefusedtotelluswhetherhe________(undertake)thejob.
heteachertoldthemsincelight________(travel)fasterthansound,lightning________(appear)togobeforethunder.