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单项选择题

Question 27 to 28 are based on the follwing news. At the end of the news item, you will be given 10 seconds to answer the questions. Now, listen to the news. When did the Big Bang happen

A.13 million years ago.
B.13 billion years ago.
C.30 million years ago.
D.30 billion years ago.
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单项选择题What is the theme of the news

A.The nation of the United States.
B.The immigrants of the United States.
C.Foreign language teaching issue in the United States,
D.Elementary Schools of the United States.

单项选择题Question 23 is based on the follwing news. At the end of the news item, you will be given 5 seconds to answer the question. Now, listen to the news. Which of the following is NOT the reason for Obama choosing Canada as his first foreign trip

A.Canada is America’s nearest neighbor.
B.The two countries’ economies are deeply interlaced.
C.U.S. trade relationships with Canada are closer than with China and the European Union.
D.America is also the largest single importer of oil and natural gas of Canada.