Itisessentialthatyou__________anydocumentcarefullybeforesigningit.
社会主义经济制度与一切以私有制为基础的社会经济制度的根本区别在于()
Weknewtheboss________beangryifwedidn’tfinishtheworkintime.
Robots,___(become)increasinglyprevalentinfactoriesandindustrialplantsthroughoutthedevelopedworld,areprogrammedandengineeredtoperformindustrialtaskswithouthumanintervention.
Therediscoveryofthisspeciesofbirdsisoneofthemost___(ordinary)scientificfindingsinrecentyears.
