单项选择题
	The first snowboards were made in the 1960s. However, it was in the late 70s that they became more   1 . Throughout the 80s, more and more people began taking up the sport, even though snowboards were not allowed on most ski hills.   2  its earlier problems, snow boarding is now the world’s   3  growing withter sport and most resorts (度假地) welcome snowboards. In 1963, a Grade 8 student named Tom Sims   4  a ski_board for a school project in New Jersey. Then, in 1966, a man named Sherman Popenn   5  two skis together for his kids on Christmas day. He called his invention "the Snuffer," which   6 the words "snow" and "surf". In 1969, Jake Burton Carpenter received a   7  for Christmas. He soon began designing boards, and today "Burton" is a popular   8  of snowboard.
	By the 1980s, snowboarding had become very popular.   9  , most ski resorts did not allow snowboarding because they thought it was too  10  . Since many snowboarders were young, many older skiers did not want them on the ski hills. The snowboarders had to go to the backcountry,   11  patrolled (有巡逻的) resorts.
	Rejection at the resorts did not   12  snowbarding from growing in popularity. Eventually, the owners of ski resorts changed their views. They   13  that they could make more money by allowing snowboarding. One by one, the resorts   14  to welcome snowboards. Today, many resorts even set   15 special areas where snowboarders can practice their creative tricks.
	The first snowboards were made in the 1960s. However, it was in the late 70s that they became more   1 . Throughout the 80s, more and more people began taking up the sport, even though snowboards were not allowed on most ski hills.   2  its earlier problems, snow boarding is now the world’s   3  growing withter sport and most resorts (度假地) welcome snowboards. In 1963, a Grade 8 student named Tom Sims   4  a ski_board for a school project in New Jersey. Then, in 1966, a man named Sherman Popenn   5  two skis together for his kids on Christmas day. He called his invention "the Snuffer," which   6 the words "snow" and "surf". In 1969, Jake Burton Carpenter received a   7  for Christmas. He soon began designing boards, and today "Burton" is a popular   8  of snowboard.
	By the 1980s, snowboarding had become very popular.   9  , most ski resorts did not allow snowboarding because they thought it was too  10  . Since many snowboarders were young, many older skiers did not want them on the ski hills. The snowboarders had to go to the backcountry,   11  patrolled (有巡逻的) resorts.
	Rejection at the resorts did not   12  snowbarding from growing in popularity. Eventually, the owners of ski resorts changed their views. They   13  that they could make more money by allowing snowboarding. One by one, the resorts   14  to welcome snowboards. Today, many resorts even set   15 special areas where snowboarders can practice their creative tricks.
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