A

The UN is an international organization consisting of countries that want to promote world peace.It 1.was_set(set) up just after the Second World War by 51 countries  2.while  today 192 countries altogether.The UN has four main functions£ºto keep international peace; to develop friendly  3.relationships(relationship) among nations£»to work together in 4.solving(solve) international political conflicts and in promoting respect for human rights£»and to be a centre for organizing the actions 5.or work of different nations.

Apart from the urgent problems 6.caused(cause) by wars and disasters£¬the UN helps countries 7.with other problems such as lack of education£¬8.starvation(starve)£¬disasters£¬AIDS and other diseases.At 9.a UN meeting in 2000£¬all of its members agreed to try and meet eight development goals by the year 2015£¬one of which 10.is(be) to ensure that clean water is available to everyone and another is that all children complete primary education.