单项选择题

—When was the first man with A(H1N1) flu in mainland China known for sure
—______ May 11, 2009.

A. In
B. On
C. For
D. Since
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单项选择题
One of the boys is ______, all the other boys are ______.
A．English
China
B．an English
Chinese
C．England
China D．English
Chinese
单项选择题
The head of the executive branch in New Zealand is______.
A. the President


B. the Governor-General
C. the British monarch

D. the Prime Minister
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