(    )1.--____do you study for a test ?

 ---I study by making flashcards.  

¡¡¡¡¡¡¡¡  A. When           B .How             C. What    

¡¡¡¡¡¡¡¡(    )2..Twelve--year--olds should not _____to work as a waiter.

¡¡¡¡¡¡¡¡ A. be ask         B. asked           C. be asked

¡¡¡¡¡¡¡¡(    )3. I find___  difficult ______ physics well.

¡¡¡¡¡¡¡¡ A. it; to learn         B. that; to learn       C. it’s, learn