The copperhead, a snake that strikes without warning, is considered more dangerous than the rattlesnake.
A. exquisite
B. sporadic
C. treacherous
D. aloof
KEY C: dangerous = treacherous: nguy hiểm
Exquisite: tế nhị, thanh nhã
Sporadic: lác đác, rời rạc
Aloof: cách biệt
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