Task 221.For as long as three months of a year, the sun_________on the ice-covered land of Alaska22.Accordingtostatistics,_________of the total area of Alaska has been used for farming, 23.Alaska was originally part of Russia, but was bought_________24.Gold did not bring to Alaska as much wealth_________25._________has become Alaska'ssingle important resource.A. as fish doesB. oilC. by the United States in the 19th centuryD. shines day and nightE. only a very small percentageF. a limited amount of the gold found there
All of the following are mentioned as factors that encourage fossilization except the