单项选择题

The specimens to be analyzed were taken _______.

A．by accident
B．at random
C．on occasion
D．on average
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单项选择题
_______ money, she is quite rich. However this does not mean that she is happy.
A．Concerning
B．In terms of
C．As to
D．In the light of
单项选择题
A budget of five dollars a day is totally _______ for a trip round Europe.
A．inadequate
B．incapable
C．incompatible
D．invalid
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