单项选择题

The Constitution's vague nature has given it the flexibility to be adapted when circumstances change.

A. imprecise
B. concise
C. unpolished
D. elementary
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单项选择题
Loud noises can be annoying.
A. hateful
B. painful
C. horrifying
D. irritating
单项选择题
Many of their ideas are being incorporated into orthodox medical treatment.
A. acceptable
B. western
C. conservative
D. conventional
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