【题目】Fully ______in preparing teaching assignment at school，she no longer has much time to enjoy the various activities as usual.
A. occupy B. occupying
C. occupied D. to occupy
在线课程【答案】C
【解析】考查形容词短语用法。本题是一个固定词组be occupied in…忙于…是对句子主语she的情况进行说明的。句意：忙于在准备学校的教学任务，他不在有时间到俱乐部里去参加各种各样的活动。