Lucy has a great sense of humour and always keeps her colleagues with her stories.
A. amused
B. amusing
C. to amuse
D. to be amused
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(答案→)A. amused
B. amusing
C. to amuse
D. to be amused
解析：考查keep+宾语+宾补结构。Amused感到高兴的； amusing令人高兴的 ；句意：露西有很强的幽默感，总是使她的同事们对于她的故事感到高兴。所以选A。