单项选择题

Questions 29 and 30 are based on the following news. At the end of the news item, you will be given 10 seconds to answer the questions. Now, listen to the news.
How many students were in this test about economics

A．79,000.
B．11,500.
C．47,000.
D．54,000.
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单项选择题
How many overseas visitors traveled to New York city in 2007
A．6 million.
B．8.5 million.
C．46 million.
D．28 million.
单项选择题
What is the concern of ordinary people about the Greenhouse Effect
A．Whether it can be detected and checked.
B．Whether it will lead to widespread food shortage.
C．Whether global warming will speed up in the future.
D．Whether it will affect their own lives.
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