单项选择题

The patient's intelligence has been ______ by a brain injury.

[A] spoiled
[B] marred
[C] impaired
[D] undermined

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单项选择题

The invention of electricity made great contribution to civilization ______ which subsequently there are few findings comparable until now.

[A] to
[B] in
[C] for
[D] from

单项选择题

His ambition led him to ______ the career of Edmund Burke.

[A] rival
[B] compete
[C] vie
[D] emulate

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