The man sat in the back of the car with a policeman on side.

问题描述:

The man sat in the back of the car with a policeman on side.
A.both B.any C.all D.either

那个男人坐在车的后座,一位警察在他旁边.
因为警察只有一个,所以只是 某一边,
二者之间,选一个,用 either