________ how they were paying for their education, almost a third of the students said they had part-time jobs or were working during the summer vacation.A.When askedB.When are askedC.When they askedD.When being asked
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A解析此处的中心词为students,他们是被人问,所以用被动此处的中心词为students,他们是被人问,所以用被动。