单项选择题

The old building is in a good state of ______ except for the wooden floors.

A．observation
B．preservation
C．conservation
D．compensation
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After seven years' work, Chinese scientists ______ the task of launching their country's first spaceship in seven years.
A．achieve
B．accomplish
C．fulfill
D．complete
单项选择题
She ______ her wedding presents on the table.
A．presented
B．displayed
C．exhibited
D．demonstrated
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