单项选择题

John got the first prize in the Math contest, ______ made his parents very happy.

A．what
B．which
C．that
D．this
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单项选择题
The mayor of Shanghai says that all construction work for the World Expo (世博会) ______ by 2009.
A．has been complete
B．has completed
C．will have been completed
D．will have completed
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