1.Don'ttakehisremarkssoseriously.HeissoupsetthatIdon'tthinkhereallyknowswhat____AhesaidB.he'dsaidc.he'ssayingd.hesays但是为什么不能用D?2.RomanEmpire_______forcenturies.A.hasexistedB.existedC.hadexistedD.wasex
1.Don'ttakehisremarkssoseriously.HeissoupsetthatIdon'tthinkhereallyknowswhat____
AhesaidB.he'dsaidc.he'ssayingd.hesays
但是为什么不能用D?
2.RomanEmpire_______forcenturies.
A.hasexistedB.existedC.hadexistedD.wasexisting
但是for+一段时间为什么不是用完成时?
3."What'swrongwithyourcoat?"
"JustnowwhenIwantedtogotoffthebudthemannexttome___onit."
A.satB.wassittingC.hadbeensittingD.hadsat
但是如果是要强调一直坐在他的外套上为什么不能用过去进行时?
4.Greateffortstoincreasewheatproductionmustbemadeifbreadshortage___avoided.
AwillbeBcanbeC.weretobeD.istobe
为什么?