Ottawais the capital ofCanada. It is the second largest city inOntarioand the fourth large

Ottawa is the capital of Canada. It is the second largest city in Ontario and the fourth largest city in the country.
　　The Centre Block is the main building on Parliament Hill (国会山). It is also the location of several ceremonial spaces, such as the Hall of Honor and the Memorial Chamber. The present Centre Block is the second iteration of the building，after the first was destroyed by fire in 1916，and it is one of the most recognizable buildings in Canada.
　　Downtown Ottawa is the commercial and economic centre of the city. Most of the buildings are office towers. While most of Ottawa’s high tech industry is based elsewhere, it has a significant presence in the downtown core. The downtown also contains a number of apartments, hotels, and the older single family homes and townhouses along its edges.
　　The National Gallery of Canada is one of Canada’s premier art galleries. The Gallery has a large and varied collection of paintings, drawings, sculpture and photographs. Although its focus is on Canadian art, it also holds works by some noted American and European artists.
　　The Rideau Canal is the oldest continuously operated canal system in North America. At the very beginning，the purpose of the Rideau Canal was military, as it was intended to provide a secure supply and communication route between Montreal and the British naval base in Kingston. It remains in use today primarily for pleasure boating, with most of its original structures undamaged. The locks on the system open for navigation in mid-May and close in mid-October.
【小题1】The underlined word iteration in the 2nd paragraph probably means .A．repairB．designC．copyD．landmark【小题2】In the core of Downtown Ottawa, we could see .A．a large number of tall towersB．head offices ofOttawa’s high tech industryC．a number of apartments and hotelsD．the older single family homes and townhouses【小题3】Collections in the National Gallery of Canada are mainly .A．paintings and drawingsB．sculpture and photographsC．works by Canadian artistsD．artwork by Americans and European【小题4】Which of the following is true about the Rideau Canal? .A．It is the oldest canal system inNorth AmericaB．It was originally for the military purposeC．The original structures remain never changedD．People can only go boating from May to OctoberC

(答案→)C 解析：文章描写了加拿大渥太华著名的几处地方，并分别对这几处地方进行详细的说明。【小题1】细节推断题。从第二段The present Centre Block is the second iteration of the building，after the first was destroyed by fire in 1916，and it is one of the most recognizable buildings in Canada.可知，现如今的中央街区是重新翻修的，以前的那一座在1916的大火中被毁坏了。所以iteration的意思相当于copy，复制品。故选C。【小题2】细节题。Most of the buildings are office towers. While most of Ottawa’s high tech industry is based elsewhere, it has a significant presence in the downtown core.可知在渥太华的市中心都是办公大楼，而且主要是高科技行业的办公大楼，故选B，而不能选A、C、D，因为文章中讲到市中心最主要的是办公大楼。【小题3】细节题。The Gallery has a large and varied collection of paintings, drawings, sculpture and photographs. Although its focus is on Canadian art, it also holds works by some noted American and European artists.可知，主要收藏的是各种各样的画以及雕像、照片。它主要是收藏加拿大人的艺术作品，同时也收藏美国人和欧洲人的作品，故选C。【小题4】判断题。A答案中它是最古老的的现在仍在使用的水沟系统，并不是最老的水沟系统，排除。C,文中讲到绝大部分没有改变原貌，并非全部没有改变，排除。D，文章讲的是五月中旬到十月中旬，故排除D.从At the very beginning，the purpose of the Rideau Canal was military可知，最初的目的是军事目的。故选B.

我明天再问问老师，叫他解释下这个问题