托业考试

根据网考网考试中心的统计分析，以下试题在2019/7/25日托业考试习题练习中，答错率较高，为：91%
【单选题】Once ______ , the goods are then stacked in a storage facility from where they will be shipped.


A．packages
B．packaged
C．packaging
D．being packaged