托业考试

根据网考网考试中心的统计分析，以下试题在2018/5/27日托业考试习题练习中，答错率较高，为：35%
【单选题】By teaming up, we finally solved the thorny problem that might ______ never have been solved by one person alone.

• (A) solely
• (B) fully
• (C) further
• (D) otherwise