He was so ______ that he ended up as a fresher in Qinghua university three years later.
A. tragic
B. diligent
C. robust
D. clear-cut
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Only by keeping down costs will America ______ its competitive advantage over other countries.
A. uphold
B. inhibit
C. slack
D. maintain
People there are told it is their ________ duty to support the national economy by buying their own products.
A. robust
B. glamorous
C. patriotic
D. tragic
His success came from ________ rather than opportunity .
A. glamor
B. optimism
C. endeavor
D. abortion
I want to ______ my partners for the very important commitments that they made to the project.
A. uphold
B. spur
C. appoint
D. commend