来自孙岗的问题
Theinventionofthemoderncomputerisoneofthegreatestcontributions___toman'sefficiencyA.havingeverbeenmadeB.evermakingC.evermadeD.havingevermade
Theinventionofthemoderncomputerisoneofthegreatestcontributions___toman'sefficiency
A.havingeverbeenmade
B.evermaking
C.evermade
D.havingevermade
