这个题目选什么,并说明理由

问题描述:

这个题目选什么,并说明理由
The center of gravity of the human body ______ behind his joint.
a. located b. locating c. to located. is located
答案是选D,但是如果有选D会不会有两个谓语了呢?
一个是is 一个是located? 不解

d
be located 位于 固定搭配