Пре­об­ра­зуй­те, если это не­об­хо­ди­мо, слово BE так, чтобы оно грам­ма­ти­че­ски со­от­вет­ство­ва­ло со­дер­жа­нию тек­ста.

There__________________ many basketball centers in cities and towns of every state. They do not often produce sportsmen or sportswomen who are successful in world basketball championships but they help young people to keep fit and look athletic.