I AM SORRY I CAN'T HELP YOU NOW. I'M BUSY _____ MY LESSON.A. TO B....
15. I am sorry I can't help you now. I'm busy _____ my lesson.
A. to
B. X
C. with
D. for
15. I am sorry I can't help you now. I'm busy _____ my lesson.
A. to
B. X
C. with
D. for