A、5 billion. B、50 billion. C、500 billion. D、5,000 billion. D细节题。由听力原文可知，在这些国家中，很多政府已经利用刺激消费计划向本国经济实体注资5万亿美元的资金。

This week, 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. Many of their governments have used spending programs to inject five trillion dollars into their economies. These efforts have had some success. Now, 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.
Questions 5 to 7 will be based on the following news item.
5. What is the news item mainly about?
6. How much money do many of G20 governments have used spending programs to inject into their economies?
7. Which is NOT a problem for those governments which have injected huge money to their economy?