问题补充：
with routine office tasks, she had no time to look after her children.
A. Occupying
B. Occupied
C. Being occupied
D. To be occupied
答案：
A. Occupying
(答案→)B. Occupied
C. Being occupied
D. To be occupied
解析：句意：由于经常扑在日常的办公室的工作上，她没有时间去照看她的孩子。这里是短语sb be occupied with某人忙于某事，因为整个句子已经有谓语动词，所以空格处只能用非谓语动词，故选B。
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