A-A+
A.It created design problems for architects.B.
问题详情
A.It created design problems for architects.
B.It made skyscrapers more expensive to build.
C.It was needed for transporting construction materials.
D.It enabled architects to design their office buildings.
参考答案
正确答案:D
解析:细节题。本题的四个选项中均是It作主语,在听问题的时候要注意It指代的是the invention of the elevator。文章第一句话说的就是elevator,关键信息是“...allowed architects to build higher...”,选项C符合原文。即使没有注意到这一信息,还可以根据文章中出现的improvement(s),inventions等词判断文章的主要基调是积极的,四个选项中只有D与之相符。