London is ( ) capital of Britain,and it is ( )_ great city,too.

问题描述:

London is ( ) capital of Britain,and it is ( )_ great city,too.

第一个空填“the”,伦敦是英国的首都,是事实,要特指,特指用“the”
第二个空填“a”,伦敦也是个伟大的城市,是泛指,泛指用“a”