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题型:单选题 题类:常考题 难易度:普通

江苏省如皋市2016-2017学年高二下学期英语期末考试试卷

The mats and the attached earth were lifted using the freezing technology, before        to our lab for further analysis.
A、transporting B、being transported C、to be transported D、transported
举一反三
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