单项选择题

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
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She ______ her wedding presents on the table.
A．presented
B．displayed
C．exhibited
D．demonstrated
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These machines all look much the same, but each has its ______ function.
A．extraordinary
B．special
C．peculiar
D．exceptional
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