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_ _________ ____________
A BC
region and can even cause lakes to disappear.
________
D
28. Most tree frogs change color to harmonize with its background.
____ ____________ __
A BC D
29. Due to the refraction of light rays, this is impossible for the naked eye to determine the
_______ _________
AB C
exact location of a star close to the horizon.
____
D
30. Modern poets have experimented with poetic devices such alliteration and assonance.
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