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  3. Standing tall as the defining landmark of Toronto is the CN Tower, Canada’s National Tower. On 553.33 metres, it is the world

Standing tall as the defining landmark of Toronto is the CN Tower, Canada’s National Tower. On 553.33 metres, it is the world

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问题    Standing tall as the defining landmark of Toronto is the CN
   Tower, Canada’s National Tower. On 553.33 metres, it is the world’s 【S1】______
   tallest freestanding tower and a symbol of Canadian achievement
   recognized around the world. This architectural triumph is an
   engineering wonder of the modern world and widely regarded as the
   iconic symbol of tourism for Toronto. With breathtaking views from
   three observation levels, the CN Tower is a worldly class entertaining 【S2】______
   and dining destination and must-see attraction when visiting Toronto.
   The CN Tower has dominated Toronto’s skyline during daylight
   hours since it opened 31 years before. But at night, the dimly lit giant 【S3】______
   fades nearly to black. Not anymore. Last week, it was illuminated 【S4】______
   for the first time in a dazzling light show. CN Tower can now claim
   to be the world’s tallest illuminated structure. The newly lit tower
   will consume up 60 percent less electricity than the old scheme. It 【S5】______
   is an energy efficient, costly effective and architecturally 【S6】______
   stunning result that whole Canadians can be proud of. On 【S7】______
   a clean night, residents will be able to spot the illuminated 【S8】______
   tower. It is hoped that the new lighting will help end Toronto’s five-
   year tourist slump. It will serve as a beacon for tourism representing
   extraordinary experiences that can be found in Toronto and throughout 【S9】______
   Canada. Throughout the year, the lighting will pay attribute to national 【S10】______
   holidays, special occasions and some citywide events.
【S6】
选项
答案costly改成cost
解析 本题辨析“名词+形容词”构成的复合形容词。cost effective实际上是一个由名词cost和形容词effective构成的复合形容词，大多数时候有连字符连接，写作cost-effective，表示“合算的，成本效益好的”。有的考生误以为costly是副词，修饰形容词effective，从而不能发现这里的错误。
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