问题补充:
I never thought of it before, all that my parents had done for me for granted.
A. taken
B. to take
C. taking
D. Took
答案:
A. taken
B. to take
(答案→)C. taking
D. Took
解析:考查固定搭配和非谓语动词。take sth for granted想当然,认为......理所当然。句意:我以前从未意识到,我(竟然不知道感激)把父母对我的付出当作是理所当然的事情。I与take是主谓关系,排除A;took不能单独使用,排除D;现在分词表示伴随状况。故选C。