The design all the ages and social groups is not easy to make.
A. appealed to
B. being appealed to
C. to be appealed to
D. appealing to
网友回答
A. appealed to
B. being appealed to
C. to be appealed to
(答案→)D. appealing to
解析：本题主干为The design is not easy to make，故所需成分应为修饰成分，此处用appealing to为现在分词作定语。句意为：能让各年龄段和社会群体感兴趣的设计方案不容易做。
【标签】现分用法