A new smart city will soon be built in the middle of the Arizona Desert，thanks to Bill Gates Smart City Project．

What is a smart city？

A smart city is a city area and people there can use the latest technology to collect information and manage resources． People live a quality life． The environment there is clean and sustainable（可持续的）．

Gates bought 25， 000 acres（ 英亩）of land near Phoenix two years ago． He planned to build a smart city with the latest technology． high﹣speed Internet， and large data centers． The city is named Belmont， It will become one of Arizona's largest cities．

About 3，800 acres will be used for office and business space． About 470 acres will be used for public schools． Around 80，000 flats will be built．

The project says that about 182，000 people will live in Belmont in the future．

The project also introduces how cities of the future are run， so it is great．

Most people think it is the hardest project． Also， at present no one knows when it will begin， or how much they will spend． Gates hasn't revealed（透露） any detail yet． But he has already spent more than 80 USD million on the project．

根据上面短文内容填空：

（1）Bill Gates had a plan to build a new smart city　　 the Arizona Desert，and he　　 25，000 acres of land near Phoenix two years ago．

（2）A smart city can provide the latest technology for people to　　and manage resources and should have a clean and sustainable　　．

（3）The city Belmont will be built into a smart city　　the latest technology and high﹣speed Internet． The city will　　 large data centers．

（4）　　the project， Belmont will have a　　 of about 182，000 in the future．

（5）The project is considered to be the most　　，and now nobody knows　　will be spent on it