单项选择题

Successive committees have______ over this problem without finding a solution.

A．reckon
B．ponder
C．speculate
D．presume
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单项选择题
Despite______ economic forecasts, enterprises are predicted to increase spending on IT.
A．gloomy
B．miserable
C．shadowy
D．obscure
单项选择题
He carries out a lot of______ on his friends who lent him money.
A．alien
B．client
C．counterpart
D．fraud
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