企源知识库

The old man kept his eyes_____ on the picture for quite some time.
A、fixing
B、fixed
C、having fixed
D、being fixed
【正确答案】：B
【题目解析】：fix on 选定，决定；keep sth doing 使某物保持…… 固定句式，句意为：老人的眼睛盯着这幅画看了好一会儿。