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
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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
单项选择题
These machines all look much the same, but each has its ______ function.
A．extraordinary
B．special
C．peculiar
D．exceptional
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