专升本考试

根据网考网考试中心的统计分析，以下试题在2018/4/2日专升本考试习题练习中，答错率较高，为：31%
【单选题】There are two kinds of computers (there), both (of them) are (widely) (used) today.

• A. there
• B. of them
• C. widely
• D. used