Recently I bought an ancient Chinese vase，________ was very reasonable.
| A．the price of it | B．its price | C．the price of which | D．the price of whose |
After two years' research，we now have a ________ better understanding of the disease.(2013·全国Ⅱ)
| A．very | B．far | C．fairly | D．quite |
It is generally believed that teaching is ________ it is a science.
| A．an art much as | B．much an art as |
| C．as an art much as | D．as much an art as |
The businessman boasts to me that I can't find a ________ gold necklace，because his shop deals in the best.
| A．good | B．better |
| C．best | D．worse |
Speaking of all the songs he has written，I think this is probably his ________ one.(2013·全国Ⅱ)
| A．better－known | B．well－known |
| C．best－known | D．most－known |
Of the two coats，I'd choose the ________ one to spare some money for a book.(2010·四川)
| A．cheapest | B．cheaper |
| C．more expensive | D．most expensive |