It's too bad. My hope is disappeared. I would not cooperate with unfamiliar people next time. I didn't know any degree of their abilities and I thought highly of them. I never thought they could give me such a huge surprise. I was too rough to check my partners‘ work early，as a result, we couldn't finish our paper on schedule. I felt crazy when I run up the paper, there were a myriad of spelling, grammar, and structure errors, it's terrible! I couldn't correct them in a short time, because I' m not good at writing either.