单项选择题

______, the design is useless.

A．To speak practical
B．Speaking practical
C．Practically speaking
D．In speaking practical
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单项选择题
The World Exposition Center ______ by the end of 2010, will attract over 70 million people.
A．completed
B．being completed
C．to be completed
D．having been completed
单项选择题
When Jack arrived he learned Mary ______ for almost an hour.
A．had gone
B．had set off
C．had left
D．had been away
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