Ingrammarpractice,substitutionand__________drillsaremostfrequentlyusedin?mechanicalpractice.
A.meaning B.matching C.correction D.transformation正确答案D
Ingrammarpractice,substitutionand__________drillsaremostfrequentlyusedin?mechanicalpractice.
A.meaning B.matching C.correction D.transformation正确答案D