Question

【题目】 John’s father went to Nanjing ________ten days ago.

A. on duty B. in business

C. on business D. on show

Answer 1

【答案】C

【解析】

试题分析：句意：十天之前，约翰的父亲去南京做生意；on duty在值日；on business做生意；on show在展览，根据题意，故选C。