Question

【题目】Obama paid a visit to China. He was warmly welcomed by Chinese people.
A.four days
B.four-day
C.four-days
D.four-days'

Answer 1

【答案】B
【解析】句意：奥巴马对中国进行了为期四天的访问。他非常受中国人民的欢迎。根据句意及题干分析“四天的访问”应是a four-day visit或four days' visit，故选B。