finally they reached an agreement , with all the concerned students.

题目

finally they reached an agreement , with all the concerned students.
这句话哪里错了,请详细分析一下,谢谢

答案

应该去掉逗号,这是一个语法错误,加了逗号就不是一个完整的句子了.reach an agreement with sb意思是和某人达成一致,固定搭配