The civil war broke out in Libya to the instability of the international oil priceA. to

问题补充：

The civil war broke out in Libya, to the instability of the international oil price．

A. to contribute

B. contributed

C. having contributed

D. contributing

答案：

A. to contribute

B. contributed

C. having contributed

(答案→)D. contributing

解析：本题考查非谓语动词。contributing to the instability of the international oil price，现在分词在句中作结果状语。选D。