I FELT ASLEEP WHEN I ... MY EXERCISES.A. AM DOINGB. AM BEING DIDB....

46. - 3500 CAU TRAC NGHIEM ON TAP AV THCS 46. - 3500 CAU TRAC NGHIEM ON TAP AV THCS
3500 CAU TRAC NGHIEM ON TAP AV THCS

46. I felt asleep when I ... my exercises.

a. am doing

b. am being did

c. was doing

d. all are correct

--> c