With a determiner: Both buses go to the airport. You can take___

With a determiner: Both buses go to the airport. You can take__________of them.
【正确答案】：either
【题目解析】：两者中任意一个，选用either句意为： 两辆公共汽车都去机场。你可以乘坐他们中的任何一个。