______ is supposed to be the essence of private enterprise. (
A. Competition
B. Compete
Competitive
D. Competence
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The students gradually _____ some knowledge of the subject at school.(
A. acquired
B. required
C. derived
D. made
Mike never tells anyone what he does for a _____. (
A. job
B. work
C. profession
D. living
Daisy was so ______ in the novel that she did not hear the door bell ring. (
A. engaged
B. delighted
C. absorbed
D. concentrated
When I saw Peter, I stopped and smiled, but he ______ me and walked on.(
A. refused
B. ignored
C. denied
D. missed
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