CORROBORATION:A．impossibilityB．uncertaintyC．insufficiencyD．disuseE．specification

1992年，联合国环境与发展大会（UNCED)，称地球峰会，在里约热内卢举行。（)

1992年，联合国环境与发展大会（UNCED)，称地球峰会，在_____举行。

CORROBORATION:A．impossibilityB．uncertaintyC．insufficiencyD．disuseE．specification

联合国环境与发展大会（UNCED)于1992年6月在瑞典的斯德哥尔摩召开。（)

Our journey was very slow because the train stopped constantly at different village.A．unce

Members of Parliament are required to ______ all their financial interests.A．discoverB．unc