问题补充:
Playing football and climbing are than watching TV.
A. more healthy
B. more healthier
C. much more healthier
D. much healthier
答案:
A. more healthy
B. more healthier
C. much more healthier
(答案→)D. much healthier
解析:句意:踢足球和爬山要比看电视更健康。因为句子中有标志词than,所以应该用形容词的比较级,healthy的比较级是healthier,much在这里修饰形容词的比较级,表示程度的加深。