Thx, 其实这道题我郁闷了好久,还是不知道答案
The army ant in African do not have permanent nests, but instead wander restless in search of food or the production of the queen cause them to 。。。
某选项:but instead when in search of food or when the production causes them to
split有是否加when这个引导词,以及production与 cause的主谓单复数一致。
更让我伤心的是纠结那么久的选项我居然想不起来了。