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
When something happens ______ we like, we usually feel joy or happiness, which is a positive and powerful emotion and for which we all strive.
A．upon
B．to
C．that
D．what
单项选择题
A spokesman said that the people had greatly ______. the pollution.
A．exaggerated
B．boasted
C．flattered
D．enlarged
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