When the thief found the police had already him ,he ran away quickly.
A. known
B. stared
C. realized
D. spotted
网友回答
A. known
B. stared
C. realized
(答案→)D. spotted
解析：考查动词：A. known知道B. stared盯着 C. realized 意识到D. spotted看见，几个选项中B是不及物动词，从句意看：当小偷发现警察看见他了，他很快跑了。选D。