单项选择题

When we have difficulty （） desired objects or reaching desired goals we experience negative emotions such as grief and anger.

A．at obtaining
B．in obtaining
C．on obtaining
D．with obtaining

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单项选择题
I can't give you （） for the type of car you sell because there's no demand for it in the market.

A．an expense
B．a purchase
C．a charge
D．an order
单项选择题
The suspect （） that he had assaulted a woman.

A．refused
B．rejected
C．declined
D．denied
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