Most of her spare time , she still kept on her research in the library.
A. occupied
B. had been occupied
C. to be occupied
D. was occupied
网友回答
(答案→)A. occupied
B. had been occupied
C. to be occupied
D. was occupied
解析：考查独立主格结构。一个名词/代词 + 一个其他结构,在句中作状语，相当于一个状语从句或并列句，人们通常称这种结构为独立主格或独立结构。这里的spare time与occupy之间为被动关系，故用过去分词。句意：大多数空余时间都被占据了，她仍然在实验室继续她的研究。故A正确。