英语改错8
问题描述：
英语改错8
请帮忙看看下面这个句子ABCD四个部分哪个地方错了,有且仅有一处错误,大家来帮忙找找哦!十分感谢!
8． The field of dynamics in physics is concerned (A) with a particle’s(B) motion in relation to (C) the forces acting(D) it.
答
d吧,应该是act on it