A、When to avoid a repeat of the financial crisis. B、When to inject money without harming a recovery. C、How to withdraw that supp

　　This week, (5) leaders of the top industrial and developing economies gathered in the eastern United States. They met in Pennsylvania, for a summit on the world’s financial future. Leaders of the Group of Twenty have now met three times in less than a year to deal with the worst recession since the nineteen thirties.
　　(6) Many of their governments have used spending programs to inject five trillion dollars into their economies. These efforts have had some success. Now, (7) the question is how and when to withdraw that support without harming a recovery, and how to avoid a repeat of the financial crisis. The leaders agreed to make the G20 the main group for their international economic cooperation, instead of the G8.
　　5.  What is the news item mainly about?
　　6.   How much money have the governments injected into their economies?
　　7.  Which is a problem for those governments which have injected huge money to their economy?