According to a UN report one third of the world population have no to clean drinking wate

问题补充：

According to a UN report，one third of the world population have no to clean drinking water and health care.

A. means

B. approach

C. channel

D. access

答案：

A. means

B. approach

C. channel

(答案→)D. access

解析：本题考查名词辨析。access意思是“(使用或见到的)机会，权利”，后面与介词to连用。]have access to sth.有接近……的机会。