【题目】Now, people have more free time. Square Dancing is becoming more and more ______.
A. comfortableB. difficult
C. differentD. popular
在线课程【答案】D
【解析】
试题分析：句意：现在，人们有更多的空闲时间。广场舞变得越来越受欢迎。A. comfortable舒服的；B. difficult困难的； C. different不同的；D. popular受欢迎的。结合句意，故选D。