There are many tall green trees onside of the street. A. either B. both Call D. every

问题补充：

There are many tall green trees onside of the street.

A. either, B. both Call D. every

答案：

解析：本题考查代词。根据句中可知street只有两边，故用either。句意：在大街的两边有许多又高又绿的树木。