F．or each blank in the following passage, there are four choices marked A, B, C and D. Choose the one that is most suitable and mark your answer by blackening the corresponding letter on the Answer Sheet.

The first snowboards were made in the 1960s. However, it was in the late 70s that they became more__21__. Throughout the80s, more and more people began taking up the sport, even though snowboards were not allowed on most ski hills. __22__ its earlier problems, snowboarding is now the world’s __23__ growing winter sport and most resorts(度假地)welcome snowboards.

In 1963, a Grade 8 student named Tom Sims __24__ a ski-board for a school project in New Jersey. Then, in 1966, a man name Sherman Poppen __25__ two skis together for his kids on Christmas day. He called his invention “ the Snurfer,” which __26__ the words “snow” and “surf”. In 1969, Jake Burton Carpenter received a __27__ for Christmas. He soon began designing boards, and today “Burton” is a popular __28__ of snowboard.

B．y the 1980s, snowboarding had become very popular. __29__, most ski resorts did not allow snowboarding because they thought it was too __30__.Since many snowboarders were young, many older skiers did not want them on the ski hills. The snowboarders had to go to the backcountry, __31__patrolled（有巡逻的）resorts.

Rejection at the resorts did not __32__ snowboarding from growing in popularity. Eventually, the owners of ski resorts changed their views. They __33__ that they could make more money by allowing snowboarding. One by one, the resorts __34__ to welcome snowboards. Today, many resorts even set __35__special areas where snowboarders can practice their creative tricks.

21. A spreading B popular C ordinary D interesting

[单选题]In the following essay, each blank has four choices.Choose the best answer and write down on the answer sheet.C．ommunicating via Email is by far the most common Internet activity.You can (71) with anyone in the world who has an Internet address or E

[单选题]In the following essay，each blank has four choices．Choose the most suitable one from the four choices and write down in the answer sheet．Open Shortest Path First(OSPF)is a (66) routing algorithm that (67) work done on the OSI IS-IS intradomain routin

[单选题]In the following essay，each blank has four choices．Choose the best answer and write down on the answer sheet．Spread spectrum simply means that data is sent in (66) pieces over a number of the discrete frequencies available for use at any time in the

[单选题]In the following essay, each blank has four choices. Choose the most suitable one from the four choices and write down in the answer sheet.The key to SNMP(66)is its simplicity. It has a small command set that does a good job of collecting information

[单选题]In the following essay, each blank has four choices. Choose the best answer and write down on the answer sheet.Spread spectrum simply means that data is sent in(66)pieces over a number of the discrete frequencies available for use at any time in the

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[单选题]Directions: In this part, there is a passage with ten blanks. For each blan

[单选题]Directions: In this part, there is a passage with ten blanks. For each blan

[单选题]Directions: In this part, there is a passage with ten blanks. For each blan

[单选题]Directions: In this part, there is a passage with ten blanks. For each blan