页数：exercise 2 part5_Q107(ios软件新多益test解析)
题目：
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
疑问：
答案是d，我是用删去法答对的，但我还是觉得用otherwise怪怪的，烦请协助解惑！
谢谢各位！