In many big cities,there _____ usually more than one underground line.
______处应填is还是are?
In many big cities,there _____ usually more than one underground line.
______处应填is还是are?
are
因为后面的more than表示不止一条地铁,所以用复数。
应该填are 前面是many big cities 主语是复数 所以谓语动词要用复数 与主语一致