高考英语单选题1、Weareallembarrassedatthesight:SomeChinesevisitors_____rubbishontheGreatWall,followedbyaforeigner_____upthelitter.A.dropping;pickedB.dropping;pickingC.dropped;pickingD.dropped;picked第一空为什

　　高考英语单选题

　　1、Weareallembarrassedatthesight:SomeChinesevisitors_____rubbishontheGreatWall,followedbyaforeigner_____upthelitter.

　　A.dropping;pickedB.dropping;pickingC.dropped;pickingD.dropped;picked

　　第一空为什么填dropping不填dropped

　　2、-Hashechangedhismind?

　　-Yes.Aftersomehoursofdiscission,I______totalkhimintoaccepingthenexplan.

　　A.hadmanagedB.wouldmanagedC.havemanagedD.managed

　　为什么选D不选C?

　　3、Sometimes,_______weshowourgratitudeforapersonisreflectedinthekindoffoodweservehimorher.

　　A.whenB.whetherC.whyD.how

　　为什么选D不选B?