_________ is his favorite toy is hard for the kid to decide.
A. who
B. which
C. how
D. where
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After dinner, I took a ________ around the park.
A. stroll
B. diving
C. run
D. walking
The boy really enjoyed the useful and ________ work in science.
A. creation
B. creative
C. created
D. creator
Some professions are ____________ with people who have not grown up.
A. stuffed
B. stuff
C. stiff
D. stiffed
What is the reason for the game’s________ appeal?
A. duration
B. during
C. endure
D. enduring