题目内容：

the prince sat in the car with a guard on ____ side of him
答案either
为么不用each

优质解答

each 的话就不是a guard了啊,就不止一个了1.(两者之中)任一的You may go by either road.你两条路都可以走.2.(两者之中)每一方的;每一的She studied history and philosophy,but she had little interest in either ...