Question

【题目】____ the morning of December 14, 2012, a school shooting took place at a school in Newton, America and 20 children were shot death.

A. In B. On C. At D. By

Answer 1

【答案】B

【解析】句意：在2012年12月14号的上午，美国的Newton的一个学校发生了枪击事件，20个孩子被射死。根据当morning/afternoon/evening有修饰词时用介词on；故选B