While the government says there is a(n) ________supply of houses，prices of apartments have been going up these years.

 In today’s fast changing and competitive world, to be able to learn faster and more effectively is not merely desirable; it is ________.

—Do you regret spending 500 dollars on the overcoat?—No,I would have paid _________ if the shop owner had insisted.

 Many companies would prefer to employ people who have gained ______ experience for the work.

--- What’s the model plane look like?--- The wings of the plane are _____ of its body.