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随时随地学习
随时随地学习
1.Whenyou__atthedoor,I__somewashing.C（D我可以确定是错的）
Aknocked...didBwasknocking..didCknocked..wasdoingDknock..amdoing
2.Mybrother__collegeforoverthreeyears.C
AhasgonetoBhasbeentoChasbeeninDhasbeenfor
3.John__surethathe____goodatchemistrysoon.D(A为什么不可以?）
Abe..willbeBis..wouldbeCwas..willbeDwas..wouldbe
4.___you__thetextyet?yes.we__ittwohoursago.C
ADid..copy...didBHave..copied..haveCHave..copied..did
5.Mother__meanewcoatyesterday,I__iton.Itfitsmewell.B
Ahasmade..havetriedBmade..havetriedChasmade..triedDmade..tried
6.Thewriterandteacher__comingnow.A(网上有答案说这是特例,指同一个人.希望得到更好的解释)
AisBareChasDhave
7.Nothingbutgrassandtrees__thehill.B（A为什么不可以?）
AcoversBcoverCcoveringDiscovering
8.Doyouhave__totellusC（我认为希望得到肯定回答用something)
AsomethingnewBnewsomthingCanythingnewDnewanything
9.Thepoormanneedsourhelp,__he?答案不确定.
AneedBneedn'tCdoesDdoesn't
10.NobodybutJaneandMary__thesecret.B
AknowBknowsChaveknownDisknown
11.Sheisoneofthefewgirlswho__inthekindegarten.B（我选的是D.）
AiswellpaidBarewellpaidCisplayingwellDareplayingwell
12.Ithinkhelives__No.386WestSt.D
Areyousure__that?You'dbettermakesure.
Aat,/Bin,ofCin,aboutDat,of
13.Thepenwriteswellthroughitdoean'tcostmuch.B
Letmehaveatry.So___（我不知道怎么区分A和B）
AitisBitdoesCdoesitDisit
14.Butterandcheese__inprice.A（CD我可以排除）
AhasgoneupBisgoneupChavegoneupDaregoneup
15.Whenmyfathergothome,I___alettertomyfriend.D（C为什么不可以?）
AwriteBamwritingCwroteDwaswrite
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