28. With credit cards ________ available, it is more frequent to see consumers pay for their purchases or bills by card instead of by cash.
At the sight of the policeman, ____ from behind the door.
Only when ___ possible to settle the problem.
___ different life today is from ___ was 50 years ago!
The Japanese guests suggested ____ their country.
What idea can a man who is blind from birth have ____ color?