________ to our study is the best way __
问题:
________ to our study is the best way ________ high grades.
A.Devote ourselves; to achieve
B.Devoting us; of achieving
C.Devoting ourselves; to achieve
D.Devoted ourselves; of achieving
________ to our study is the best way ________ high grades.
A.Devote ourselves; to achieve
B.Devoting us; of achieving
C.Devoting ourselves; to achieve
D.Devoted ourselves; of achieving