I study English ______ making flashcards.

——       do you study English?

——By        flashcards.

A. Why, make          B. How, making        C. What, making      D. When, make

-How do you learn English words?

-__________ making flashcards.

A. To　　　　 B. By　　　　 C. For 　　　 D. With

How do you study ____ tests?

---- I study ____ making flashcards.

A．for with           B．of by             C．for by            D．with for