Using the information in the text, complete each sentence 14-18, with a word or phrase from the list below.
For each sentence(14-18), mark one letter(A-G)on the Answer Sheet.
Do not mark any letter twice.
A. professional and managerial employees
B. work staff
C. human-resource management
D. work force skills
E. important post
F. the improvement of worker's basic skills
G. more money should be invested

填空题 American firms don't attach much importance to 1.

填空题 The sustainable competitive advantage of American firms does not depend on 1.

填空题 The head of human resource management is a/an 1.

填空题 The money the American firms put in work-force training goes to 1.

填空题 The decisive factor in maintaining a firm's competitive advantage is 1.