21．Why do coconuts enjoy great popularity among athletes?

A．They are easy to cut off．

B．They contain minerals and salts．

C．They have jelly-like flesh in the shell．

D．They can provide vitamins for athletes．

22．What do we know about coconut trees?

A．They have fewer uses than coconuts．

B．Their trunk can be eaten in salads．

C．Their roots can be used to make clothes．

D．Their 1eaves can be used as the cover of huts．

23．What is the passage mainly about?

A．The uses of coconuts．

B．The magic of coconuts．

C．The culture of coconuts，．

D．The nutrition of coconuts．

　　The idea of a world language is not a new one．In the 1870s，and 1880s a Polish man called Dr Ludovic Zamenhof invented a new language called Esperanto．Zamenhof hoped that if everyone learned Esperanto there would be greater peace and understanding in the world．At first many people did learn Esperanto and in China in 1911 people even discussed making Esperanto the official language．Nowadays Esperanto is still learned and spoken by some people，but nobody now thinks that it will become a world language．

The question people ask today is：Will English become the world language in the future? More and mole people are learning English and English has become the international language of science，business，diplomacy and the Internet．Is it possible that by 2050 every world citizen will speak English either as a first or second language? Many people think so，hut others argue that it will be normal for people to be multilingual in the future and that people who only speak English will be at a disadvantage．Another argument we have to consider is that a different language might emerge as a world language．After a11，English has only become a dominant language because of British colonial history and American economic power．Chinese already has more native speakers than any other language in