托业考试

根据网考网考试中心的统计分析，以下试题在2018/4/24日托业考试习题练习中，答错率较高，为：96%
【单选题】Before buying a factory ______ setting up one of your own in that area, you should carefully evaluate the security risks there.

• (A) so that
• (B) nor
• (C) or
• (D) so