【问几题英文的单项选择题...并说明理由ItwasthethirdtimethatI_____inathisoffice.A.havedroppedB.haddroppedC.droppedD.wasdroppingWe_____abouttwothousandenglishwordsbytheendoflastterm.A.learnB.havelearnedC.hadl】

　　问几题英文的单项选择题...并说明理由

　　ItwasthethirdtimethatI_____inathisoffice.

　　A.havedroppedB.haddropped

　　C.droppedD.wasdropping

　　We_____abouttwothousandenglishwordsbytheendoflastterm.

　　A.learnB.havelearned

　　C.hadlearnedD.wouldlearn

　　Myfather,whodiedfifteenyearsago,_____verykindtome.

　　A.isB.wasC.hadbeenD.wouldbe

　　We_____ourseatstillthepartyhadbegun.

　　A.hadn'tfoundB.didn'tfind

　　C.haven'tfoundD.wouldn'tfind

　　Inthepastit_____peopletwoyearstogoroundtheworld.

　　A.hadtakenB.hastakenC.tookD.wastaking