Overwork,little rest and poor food all c_____ to his illness.填contribute还是contributed呢?

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Overwork,littlerestandpoorfoodallc_____tohisillness.填contribute还是contributed呢?Overwork,littlerestand

Overwork,little rest and poor food all c_____ to his illness.填contribute还是contributed呢?
Overwork,little rest and poor food all c_____ to his illness.填contribute还是contributed呢?

Overwork,little rest and poor food all c_____ to his illness.填contribute还是contributed呢?
contributed 因为他已经生病了,所以用过去时态

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contributed,说这件事情的时候他已经病过了,所以这只是在陈述过去的客观事实,所以用过去时态。

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