You ________ go now. It ’s getting late.
A、hadratherC
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heteachertoldthemsincelight________(travel)fasterthansound,lightning________(appear)togobeforethunder.
Ifound________toanswerallthequestionswithinthetimegiven.
Thedirectorrecommendedthatshe________(study)moreEnglishbeforegoingabroad.
Iwishyou________likethat.
Onlywhenyouhaveobtainedsufficientdata________cometoasoundconclusion.