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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单项选择题
We were warned that even a slight ______ in calculation might ruin the whole project.
A．mistake
B．fault
C．flaw
D．error
单项选择题
Although thrift all his life, the man left the ______ fortune to his son.
A．huge
B．immense
C．magnificent
D．rich
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