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17. There has always been an epldemic or bike stealing in schools.
A) a theft B) a punishment
C) a plague D) a crime
18. It is in Chongqing that the next international symposium on environmental protection will be held.
A) debate B) conference
C) seminar D) negotiation
19. Many people suspected the existence of extraterrestrial life.
A) snowman B) outside the earth
C) spiritual D) underworld
20. In case your liabilities outrun your assets, you may go bankrupt.
A) debt B) enterprise
C) controversy D) bondage
21.After the fierce quarrel, they began to have a __________ loathing for each other.
A) boring B) reciprocal
C) friendly D) standing