The program was so exciting that the children kept their eyes on the screen.A. to fix B.

发布时间：2020-08-15 00:36:28

The program was so exciting that the children kept their eyes      on the screen.
A. to fix
B. to be fixed
C. fixed
D. fixing

网友回答

A. to fix
B. to be fixed
(答案→)C. fixed
D. fixing
解析：由固定结构fix one’s eyes on/upon...可知此处应用过去分词。
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