单选题 He drives much ______ than he did ten years ago.
  • A. carefully
  • B. more careful
  • C. more carefully
【正确答案】 C
【答案解析】[解析] 本题考查副词比较级。这里需要一个副词来修饰动词drive,careful是形容词，carefully是副词，所以先排除B；than要求用比较级，所以排除A，选C。carefully的比较级是在前面加more。