__________ , some students tend to develop a range of unhealthy habitsA.Parents don’t watch over themB.Not having watched overC.With no parents to watch over themD.Parents watched over
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C解析考查with复合结构。从句的逻辑主语就是主句的主语some students，A和D 都不对，逻辑主语some students 和动词watch over 是被动关系，学生是被监管，B不对可以说Not watched over, some students tend to ……。C是with 的复合结构。