1. The head of the office was (　) five ranks and received a pay cut.
(A)yielded (B)demoted (C)elaborated (D)resurrected
2. Eligible students will be exempt from (　) and enrollment fees.
(A)tuition (B)foundry (C)pedigree (D)thoroughfare
3. He was very loyal and would do anything for his (　).
(A)trunks (B)comrades (C)fragments (D)fountains
4. The latest findings may (　) the widely accepted theory.
(A)upend (B)quell (C)derail (D)disrupt
5. She didn't like spices, and always said no to (　) meals.
(A)vital (B)dense (C)peppery (D)thorough
6. The entrepreneur thought outside the box and broke new (　).
(A)stage (B)ground (C)course (D)bucket