Apart from the urgent problems by wars and conflicts, the UN helps countries with other problems such as lack of education ,lack of food , poverty ,disasters and disease.
A. to cause
B. having been caused
C. caused
D. having caused
网友回答
A. to cause
B. having been caused
(答案→)C. caused
D. having caused
解析:可联系答.案.网客服索取。