单项选择题

Jane was nervous________.

A．because she was worried about the birthday party
B．because she found this history course very challenging
C．because she thought her term paper might be late
D．because she had a very hard time sleeping
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________has been the major problem in the Great Lakes in recent years.
A．Too many algae
B．Excessive recreational use
C．Lack of adequate rainfall
D．Too much evaporation
单项选择题
Which of the following is NOT among European countries seeking a negotiated settlement to Iran nuclear problem
A．Austria
B．Britain
C．France
D．Germany
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