city可數嗎

　　例句：

　　1、Building more motorways and bypasses will help the environment by reducing pollution and traffic jams in towns and cities

　　建造更多的高速公路和繞城道路能夠減少城鎮中的污染和交通堵塞，有利于改善環境。

　　2、A new telegraph line has been set up between the two cities.

　　那兩個城市之間架設了一條新的電報線。

　　3、In the long term the company hopes to open in Moscow and other major cities

　　公司的長期目標是希望在莫斯科和其他大城市開門營業。