[ Grammar ]
The orangutan scratches __ on the back.
A. itself
B. himself
C. themselves
D. herself

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Vocabulary › ViewCrystals of the mineral were then carried in suspension by the upward-moving _______ through the long funnel.
A. magma
B. mutations
C. energy
D. kinetics
Grammar › View
She enjoys ____ in the park on weekends.
A. walk
B. walking
C. walked
D. walks