Ifound________toanswerallthequestionswithinthetimegiven.
A、nopossibilityheteachertoldthemsincelight________(travel)fasterthansound,lightning________(appear)togobeforethunder.
Herefusedtotelluswhetherhe________(undertake)thejob.
Wewerebusy________(get)thingsreadyforthetrialproductionwhenhephonedus.
Thedirectorrecommendedthatshe________(study)moreEnglishbeforegoingabroad.
Hefellasleepimmediatelylastnight;hemust________(be)verytired.
