(2013·江西六所重点高中一模)We take clean drinking water for granted. One day we may run out of it.
A. needn't
B. can't
C. won't
D. shouldn't
网友回答
A. needn't
B. can't
C. won't
(答案→)D. shouldn't
解析：选D 考查情态动词。句意：我们不应该把拥有洁净的饮用水看作是理所当然的。也许有一天，我们会用完它。shouldn't“不应该”，符合句意。