I have to go now because I must be ____ for class, otherwise, the teacher would scold me. [ ]

A. punctual

B. active

C. sensitive

D. optimistic

青春期功能失调性子宫出血最常见的临床类型是：（）

A．黄体期缩短

B．黄体萎缩不全

C．有排卵性功血

D．无排卵性功血

E．以上均不是