题目内容：

阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

In the past， nothing aroused the spirit of America 's emerging economy like the skyscraper. Height1.be) a fascination since the pyramids. It's closer to the heaven. It scares off your enemies. It makes you faithfully kneel down in awe.

But the height of these buildings2.(create) many new engineering problems. The real challenges are that architects are moving into a different league of engineering, one of3.is wind loading. Wind loading is a term engineers use4.(measure) the effect of the wind on a tall building. The more flexible the building, the5. (safe) it is. A tall building's flexibility also helps it survive earthquakes. Probably the safest place you can be in6.earthquake is in a tall building. When the earthquake hits the building, it's able to just bend and move with the earthquake force but not break. All7.all, the engineering advancements used to construct these super tall buildings can turn one man's dream into8.(real). As a matter of fact, we're not so much9.(interest) in how a building meets the ground as we are how a building meets the sky. Despite the challenge of10.(construct) the word's tallest skyscrapers, the passion of exploration will never go out.