A、Southeast Asia. B、East Asia. C、South Africa. D、South Asia. D原文中提到，为了按期完成工程，承包商引进了几十万流动工人，这些工人主要来自南亚国家。因此答案为D。

Qatar is spending almost $500 million a week on major infrastructure projects as it prepares for the 2022 FIFA World Cup, its Finance Minister has said.
    Ali Al Emadi expected spending to continue at that level for three to four years as new stadiums, motorways, rail links and hospitals are built.
    More than $200 billion will be spent in total by the gas-rich country. But Mr. Emadi denied that the plans would make the 2022 tournament the most expensive World Cup yet.
    The 2014 World Cup in Brazil is reported to have cost $11 billion to host, while Russia increased government spending on the 2018 World Cup by $321 million to $10. 7 billion.
    Brazil struggled to get many of its stadiums ready, but Mr. Emadi told reporters in Doha on Tuesday that Qatar had already awarded 90％ of the contracts for 2022 projects and that two-thirds would be delivered within the next 24 months.
    "We are giving ourselves a good chance to deliver things on time, " he added. "We don’t want to be in a place where we start painting when people are coming to the country. "
    To achieve this, contractors have brought in hundreds of thousands of migrant workers, mainly from South Asian nations, who human rights groups say have been exploited and forced to work under dangerous conditions.
    Qatar’s government has denied that the workers are exploited and in December it implemented reforms designed to improve the rights of the migrant workers.
    Mr. Emadi said the money for the World Cup projects had been protected from cuts to the national budget caused by low oil and gas prices.
    Questions 9 to 11 are based on the passage you have just heard.
    9. What is this passage mainly about?
    10. Where do migrant workers mainly come from?
    11. What did Mr. Emadi say about the money for the World Cup projects?