Are you good at _______ football ?
A. playing B. play C. plays
I go to school _____ bike .
A. on B. of C. by
---________ do you do exercise ?
---Once a week .
A. How long B. How often C. How soon
We can learn English by ________ .
A. watching TV B. watch TV C. to watch TV
He ________ his homework at 9 o’clock yesterday .
A. does B. was doing C. did