 Complete the following phrase:  After skiing some domestic races in the 2006 season, Johaug took part at the Norwegian Championships in 2007, winning a bronze at the 7.5 km  7.5 km double pursuit event. She was selected for two World Cup races prior to the World Championships, finishing eighth and 33rd in two interval start races over 10 km, which was enough to be selected for competition in the 30 km distance at the 