If large sums of money are to be spent on environmental disasters, it is better to spend them on______problems such as unsanitar

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问题 If large sums of money are to be spent on environmental disasters, it is better to spend them on______problems such as unsanitary water in third-world countries.

选项 A、pressing
B、promising
C、protruding
D、puzzling

答案A

解析    (1)句子结构。
   本题句子是一个主从复合句:从句为if引导的条件状语从句,主句是一个主动补结构,其中it为形式主语,is为系动词,better为主语补语,后面的不定式to spend them…是真正的主语。
   (2)选项词义。
   A.pressing adj.紧迫的;迫切的,急迫的;恳切的
   B.promising adj.有前途的;有希望的;光明;有为
   C.protruding adj.突出的;伸出的
   D.puzzling adj.使为难的,费解的,令人困惑的
   本句大意为“如果要斥巨资预防环境灾难,最好把钱花在一些亟待解决的问题上,比如改善第三世界国家饮水安全”。因此,选项A最符合句意。
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