1.Afterthehigh-rankingofficials_____,thecurtainroseandtheplaybegan.
A.wasseatedB.hadseatedC.wereseatedD.weresat
2.Theoldmanwasrundownbyacar.Hewastakentohospitaland_____onbythechiefsurgeonrightnow,
A.operatedB.havingbeenoperatedC.isoperatedD.isbeingoperated
请说明选择的原因说的好我会加分的