Lucy went to Shanghai to visit her friends July 25th last summer.A. in B. toC at D. on

问题补充：

Lucy went to Shanghai to visit her friends July 25th last summer.

A. in B. toC at D. on

答案：

解析：表示时间时，in表示一个时间范围，to表示差……不到，at表示在具体时刻，on表示在某一天，去年夏天七月二十五日是具体某天，所以选D。