_________a written permission, he had to write another letter to the president of the university.
—Do you regret spending 500 dollars on the overcoat? —No,I would have paid _________ if the shop owner had insisted.
Americans eat ________as they actually need every day.
After the new technique was introduced, the factory produced______ tractors in 1998 as the year before.
_____ can you expect to get a pay rise.
Not only _____ polluted, but _____ crowded.