____ has been proved again and again that ____ is said in the ads greatly affects people’s impression of the products.
Such men have made______by developing oil businesses.
There are ten______teachers and two hundred______students in the school.
Such a magazine has______except when you have time to kill.
We must take measures to protect endangered wildlife ______it is too late.
People living in the area where there is a lack of electricity often keep a supply of candles_______power failure.