In these years the shortages of water has become a problem.A. globalB. historicalC. chem

问题补充：

In these years, the shortages of water has become a problem.

A. global

B. historical

C. chemical

D. local

答案：

(答案→)A. global

B. historical

C. chemical

D. local

解析：考查形容词词义辨析。A全球的；B历史上的；C化学的；D当地的，地方的；句意：在这些年里，缺水问题已经成为一个全球范围的问题了。根据句意说明A正确。