In buses, all of us thieves.
A. keep an eye out for
B. are keep an eye out for
C. are kept an out for
D. keep eye out for
网友回答
(答案→)A. keep an eye out for
B. are keep an eye out for
C. are kept an out for
D. keep eye out for
解析：考查短语：当心，注意，keep an eye out for，句意：在公交车上，我们所有的人要当心小偷。所以选A。