How do you study _____ a test? -- I stud
问题:
How do you study _____ a test? -- I study _____ making flashcards
A.by, for
B.for ,for
C.for , by
D.by , by
How do you study _____ a test? -- I study _____ making flashcards
A.by, for
B.for ,for
C.for , by
D.by , by