There is no______ authority in scientific studies,each having his own advantages.
A. absolute
B. abstract
C. abrupt
D. abundant
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Most of the house remains ________ even after two hundred years.
A. intact
B. rigid
C. genetic
D. abrupt
It is very selfish to take______ of this disaster for personal gains.
A. aggression
B. affection
C. adventure
D. advantage
To ensure the_____ supply of vegetables to cities calls for easy transportation.
A. adequate
B. addictive
C. approximate
D. antique
Her determination to_____ her goal of life motivated her to greater effort.
A. retain
B. attain
C. maintain
D. entertain