25．A heavy drought is hitting the south－west part of China severe problems for hundreds a

问题补充：

25．A heavy drought is hitting the south－west part of China, severe problems for hundreds and thousands of people and cattle to get fresh drinking water.

A. causing

B. caused

C. to cause

D. having caused

答案：

(答案→)A. causing

B. caused

C. to cause

D. having caused

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