Lead: 'The United States and other members of the Group of Eight industrialized countries this week reiterated their commitment to doubling aid to Africa by 2010, seeking to assuage growing concern that they will miss the ambitious targets they set three years ago in Gleneagles, Scotland.' The article continues: 'They promised to create a global partnership of governments and nonprofits to address the food crisis that threatens to wipe out recent gains on the continent. They instituted new 'accountability' procedures to ensure that wealthy countries fulfill their promises of aid to Africa. And they issued a sharply worded statement questioning the legitimacy of the government of President Robert Mugabe in Zimbabwe.'