Iftheoperation________carefullyprepared,itwouldnothavebeensuccessful.
改写病句:Shakespearewrotecomedies,tragedies,romances,andtheplayswhichwerebasedonhistoricalevents.
Lookatthisgroupofpeople______beachvolleyball.
Thenewdiscovery_______beofgreatservicetomankind.
Whatarethecharacteristicsofgoodwritings?