He decided to ______ a more radical approach to the problem.
A. adept
B. adopt
C. adapt
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It's wrong to ______ him of things without proof
A. access
B. accuse
C. assess
Where there are difficulties, there are __________
A. solution
B. solves
C. solutions
The program did much to ______ little-known actors.
A. popularize
B. popular
C. popularity
You should ______ the water before drinking it.
A. beautify
B. simplify
C. purify