问题标题：
-----,andstudentshavingreturned,thiscollegetoowillstartoutwith-------effortintheworkthatliesbeforethem.A.Thesummervacationisover;greatB.Thesummervacationbeingover;renewed.C.asthesummervacationover;refreshingingD.Hadthesu
问题描述：
-----,andstudentshavingreturned,thiscollegetoowillstartoutwith-------effortintheworkthatliesbeforethem.A.Thesummervacationisover;greatB.Thesummervacationbeingover;renewed.C.asthesummervacationover;refreshingingD.Hadthesummervacationbeenover;sacred.
范翔回答：
这个句子的主句是后面的thiscollegetoowillstartoutwith------effortintheworkthatliesbeforethem.所以前面部分只是充当状语,不能是完整的句子,故havingreturned采用动名词作状语.and前后的结构应该...
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