按照培训的内容不同，可以将培训开发分为，不包括（）。
A.发展性培训
B.专业知识培训
C.基本技能培训
D.工作态度培训
参考答案：A
Frank is working late again. This is the first time this week he's had to study late,_____? [ ]
A. isn't he
B. hasn't it
C. hasn't he
D. isn't it
