28. With credit cards ________ available, it is more frequent to see consumers pay for their purchases or bills by card instead of by cash.
The question under discussion here is ______ of the "white pollution".
I hate _______ when someone calls or knocks at the door while I’m still in bed.
The hike costs £2,500 ____all fights and accommodation.
_____ the group guide, all teams have cookers and porters.
Marco, ____, was amazed by how beautiful and powerful China was.