Each winter, the rugged North Shore serves up some of the 
largest and most impressive ocean waves on the planet．Giant waves make their long journey across the northern Pacific to the area’s shoreline．For many island residents, this means only one thing: surf up．
The exact origin of surfing is unknown, but most historians believe that the Polynesians were already very good at the sport by the time they migrated to the Hawaiian Islands some 2 000 years ago．Early Hawaiians called surfing “He’e nalu”, which literally translates to “wave sliding”．During this time, only high-ranking officials and nobles had access to the best surf spots．King Kamehameha himself was said to be a keen and skilled surfer．
Surfing really took off in the early 1990s．Riding boards made from redwood and balsa wood, early surfers risked their lives to take on these giant waves．
Today, thanks to a number of modern innovations and inventions, the surfing population on the North Shore has exploded．Wave riders and spectators from around the world gather here from November to February, hoping to catch that perfect wave．Winter wave heights can get as high as 20 feet, with faces up to 50 feet! This extreme surf is for experts only, and even then conditions are considered highly dangerous．
World-known surf contests are held here from early November to late December．The Van’s Triple Crown of Surfing, which includes the Vans Hawaiian Pro at Ali’ i Beach Park in Hale’ iwa, the Rip Curl Cup at Sunset Beach, brings together the world’s best professional surfers．Watching them surfing on the grand waves is really a feast for the eyes．
Although winter on the North Shore may not be the best time and place to learn how to surf, the summer months provide safer and more favorable conditions．
64．The passage is most probably from ________．
A．a guide book B．a magazine
C．a government report D．a geography textbook
65．What can we learn from the passage?
A．High officials were the best surfers in the past.
B．Surfing dates back to at least 2 000 years.
C．The best time for surfing is from November to February.
D．Surfing is a sport for professionals and experts.
66．Which of the following is NOT true to the passage?
A．The Polynesians were among the earliest people who took up surfing.
B．Modern inventions make surf boards safer for the surfers.
C．It is a perfect chance for spectators to watch the competitions.
D．More and more people on the North Shore go in for surfing.
67．It’s suggested that a surf learner should ________.
A．make use of the summer time to learn how to surf
B．meet the challenge of the perfect waves on the North Shore
C．take the chance to win a prize in the world-known competitions
D．watch the professional suffers surfing whenever possible