47. I saw Jack yesterday morning while I
A. walked
48. My brother....
B. was walking
...... out at weekend.
A. doesn't usually go
C. doesn't usually goes
49. Everyday, my sister
A. usually clean
home from work.
C. am walking D. had been walking
B. does usually not go
D. usually doesn't goes.
......the floor.
B. cleans usually C. usually cleaned
D. usually