_______, and students having returned, the school will start with ________ effort in the work that lies before it.A.The summer vacation is over; refreshingB.As the summer vacation over; renewedC.The summer vacation being over; renewedD.With the summer vacation being over; refreshing
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C解析试题分析：句意：暑假结束了，学生返校了，学校又开始了更加努力的工作。and连接的是两个并列的独立主格结构,故排除AB，因为前后两者的形式应该一样，故排除D；renewed更新的，形容词。故选C。考点：考查独立主格结构及形容词的用法。
点评：本题难度适中。独立主格结构是高中的难点，近几年考得次数较少，需要考生有分析理解复杂的句子结构的能力，还必须能够理解句意。对于形容词的考查主要是它们的意义及用法。即学即练：The lecture_________，he left his seat so quietly that no one plained that his leaving disturbed the speaker． A．began B．beginning C．having begun D．being beginning 解析：C。