单项选择题

For most allergies, the best treatment is elimination of the bothersome substances from the sensitive person’s environment.()

A. unnatural
B. dangerous
C. irritating
D. surrounding

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单项选择题
The child's abnormal behavior puzzled the doctor.()

A. funny
B. frightening
C. repeated
D. unusual
单项选择题
Of the reptile groups, the snake group was the final one to appear.()

A. last
B. best
C. ugliest
D. longest
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