单项选择题

The wild animals are enclosed in small cages in the zoo.

A. limited
B. bounded
C. restricted
D. confined
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单项选择题
The river widens considerably as it begins to turn west.
A. twists
B. stretches
C. broadens
D. bends
单项选择题
These are their motives for doing it.
A. reasons
B. excuses
C. answers
D. plans
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