甲欠乙10万元钱，丙为保证人，约定丙保本金。后甲未还债，产生利息和违约金。乙有权要求丙承担全部责任。()
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A．setB．caughtC．onD．in
A. set
B. caught
C. on
D. in
A．triedB．succeededC．managedD．decided
A. tried
B. succeeded
C. managed
D. decided
A．cigaretteB．fireC．carD．forest
A. cigarette
B. fire
C. car
D. forest
Some computers are "user friendly", which means they______ .
A. show great affection for people who use computers
B. can be easily operated
C. are sold at a very low price
D. rarely make mistakes
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