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Using bicycles ______ greatly to people’s physical fitness as well as easing traffic jams.

A. substitutes    B. attributes     C. distributes     D. contributes

D


解析:

contribute to固定搭配,意为“促成,有助于”。句意为:使用自行车有助于人们的身体健康,并极大地缓解了交通阻塞。substitute意为“代替”;attribute意为“归于,属于”;distribute意为“分配,散布”。

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