【正确答案】 C

【答案解析】diligent：勤奋的，努力的。hardworking：勤奋的，努力的。Jack was hardworking and energetic. ambitious：雄心勃勃的；有野心的。Chris is so ambitious，so determined to do it all, lazy：懒惰的。I was too lazy to read music. clever：聪明的。She is beautiful and clever.