14. The tendency to worry ________. A. may be something we are born with B. depends entirely on our experience C. doesn’t vary much from one person to another D. is a social or national characteristic

14. The tendency to worry ________.
A. may be something we are born with
B. depends entirely on our experience
C. doesn’t vary much from one person to another
D. is a social or national characteristic

出自：大学英语第二册

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