问题
选择题
---Kate won the drawing competition yesterday. It was so cool!
---- Yes. She spend all her free time _____ drawing.
A．keep on
B．keep practicing
C．in keeping on
D．on keeping practicing
答案
C
题目分析：句意：凯特昨天赢得了绘画比赛，太酷了！是的，她把所有业余时间花在不断绘画上了。spend time in doing把时间花时做某事上，固定搭配，keep doing持续做某事，固定搭配，故选C.