【又是单选.56.Peter,whohadbeendrivingallday,suggested_____atthenexttown.A.tostopB.stoppingC.stopD.havingstopped为什么是D?58.Thewitnessclaimed_______amanoutsidethehouse,buthewasnotsurewhether】

　　又是单选.

　　56.Peter,whohadbeendrivingallday,suggested_____atthenexttown.

　　A.tostopB.stoppingC.stopD.havingstopped

　　为什么是D?

　　58.Thewitnessclaimed_______amanoutsidethehouse,buthewasnotsurewhetherthiswastheman.

　　A.toseeB.tohaveseenC.seeingD.havingseen

　　这题为什么又用现在完成时?搞不懂.

　　65.ZhouLaninsistedon______toworkinXinjiang.

　　A.beingsentB.sendingC.sentD.besent

　　怎么都看不出是进行时,被动还能看出来.

　　69.Computersareused______peopleinallkindsoffields.

　　A.tohelpingB.helpingC.tohelpD.tobehelped

　　不是beuesdtodoing吗?怎么不对?

　　70._______nohomeworkleft,thepupilscoulddowhatevertheyliked.

　　A.TherebeingB.TherehadC.TherewasD.Therehaving

　　为什么是A不是C?