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【单选题】While notable improvements have been made, nearly 750 million people—half in sub-Saharan Africa and half in Asia—still lack access to clean drinking water, a new report released by WHO and UNICEF has ...
A.
Half Africans lack access to clean drinking water.
B.
The endeavor to solve water problem is not effective.
C.
Water shortage for daily life mainly occurs in Africa and Asia.
D.
The majority of people in the world are suffering from water shortage.