People will find themselves suffering from headache and watering eyes and even snowblindn
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People will find themselves suffering from headache and watering eyes, and even snowblindness, when______to several hours of "snow light".
A.being exposed
B.having been exposed
C.exposed
D.exposing
请帮忙给出正确答案和分析,谢谢!
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正确答案:C
相当于whentheyareexposedto…。在when,if,unless,though,while,once引导的从句中,如省略,必须将主语与be动词一起省掉。另外,“人们被置于雪光中”,是被动语态,所以D是错的。
