The Building That Moves

Everyone knows that buildings don't move．They can't change the way they look．However，architect（建筑师）David Fisher wants to change that．

Fisher has an amazing idea．He wants to make 80﹣story buildings that change shape．Each floor will move around slowly．The floors will move at different speeds．Because of this，the shape of the building is always changing．"These buildings will never look the same，"says Fisher．

His idea is an interesting one．However，Fisher doesn't stop there．He also wants the building to be"green"．The building will make its own energy．In most buildings，only the top floor has a roof（屋顶）．In Fisher's building，each floor will have its own roof．The roofs each have solar panels（太阳能板）．This means a lot more solar energy．Also，machines between each floor of the building will catch the wind．They will turn the wind into energy．

Fisher's ideas sound impossible．However，that's what people also said before humans traveled into space!

16．The passage is mainly talking about　　．

A．buildings for the future

B．the life of an architect

C．how green buildings work

17．The underlined word"80﹣story"means the building has 80　　．

A．shapes

B．floors

C．different speeds

18．Fisher's building can make its own energy because the building　　．

A．is tall and always moving

B．is tall and has many solar panels

C．is always moving and has many solar panels

19．The Fisher's building will NOT get energy from　　．

A．the sun

B．the water

C．the wind

20．Why does the writer say"that's what people also said before humans traveled into space"？　　_　　

A．To show why Fisher's building will never work．

B．To show why Fisher's building is like a spaceship．

C．To show that unusual ideas can sometimes work．