阿摩線上測驗
45 The civil rights movement lasting for a decade caused some violent incidents and marked a period of social _____
in the country.
(A) burglary
(B) syndrome
(C) tendency
(D) upheaval
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統計： A(83), B(96), C(147), D(114), E(0) #2939207
統計： A(83), B(96), C(147), D(114), E(0) #2939207
