With credit cards ________ available, it is more frequent to see consumers pay for their purchases or bills by card instead of by cash.
—_______ listen to music in the classroom, Peter. —Sorry, I won’t, Mrs. Black.
Driving a car is not so difficult as you imagine, if you _______ the rules.
She has to _______ her journey because of her mother’s illness.
Zhang Lin was addicted to computer games during his last year in high school, otherwise he _______ a student of Beijing University.
The science of the library is sometimes broken by a sudden cough or the sound of pages _______.