—What are you going to be when you ?—I am going to be a writer.A. get upB. grow upC. pick

问题补充：

—What are you going to be when you ?

—I am going to be a writer.

A. get up

B. grow up

C. pick up

D. put up

答案：

A. get up

(答案→)B. grow up

C. pick up

D. put up

解析：get up起床;grow up长大;pick up捡起,获得;put up举起,张贴,建造.根据下文,我打算做一个作家.可知上文指的是,你长大后打算做什么?故选B.