医生通过额外检查确认了这一诊断。

The doctor ___confirmed the diagnosis with additional tests.

新证据证实了这位科学家长期持有的理论。

The new evidence ___confirmed the scientist's long-held theory.

研究人员证实，消费主义可能发展成一种强迫症。

It was ___confirmed by researchers that consumerism can develop into a compulsion.