15．All over the world people enjoy sports．Sports help people to keep （51）C，happy and to live （52）B．People play different games in winter and summer．（53）B is good for swimming．And in winter people often go skating．Some sports are very （54）Dand people everywhere like them．For example，football is very popular．In China，most people，men，（55）B，boys and girls，like to watch football games．They often talk about it．（56）C and jumping began long，long ago．But basketball and volleyball are rather （57）A．People began to play them not long ago．And people are （58）C new sports or games all the time．Water skiing is one of（59）D．People （60）C different countries may not be able to understand each other，but after a game they often become friends．
| 51．A．health | B．busy | C．healthy | D．lazy |
| 52．A．long | B．longer | C．happy | D．happily |
| 53．A．Winter | B．Summer | C．Autumn | D．Spring |
| 54．A．boring | B．difficult | C．expensive | D．interesting |
| 55．A．woman | B．women | C．old | D．young |
| 56．A．Run | B．Runs | C．Running | D．To run |
| 57．A．new | B．interesting | C．popular | D．old |
| 58．A．start | B．play | C．playing | D．starting |
| 59．A．oldest | B．newest | C．the oldest | D．the newest |
| 60．A．in | B．of | C．from | D．at |
