Question

【题目】—Have you heard about the event of vaccine（疫苗）?

—Yes. It has caused a(n) _________ influence on medicine safety.

A. active B. common

C. medical D. unexpected

Answer 1

【答案】D

【解析】

试题分析：句意：你听说疫苗事件了吗？——是的，它对医药安全产生了不可预期的影响。A. active 积极的；B. common 普通的；C. medical 医学的；D. unexpected意外的，想不到的。结合句意可知，答案为D。