31. Look at the four squares [⬛] in the passage. Where would the following sentence best fit? "The Americans agreed to do this but increasingly made 'quick changes' to lighting or electrical components without taking boots off."
(A) A
(B) B
(C) C
(D) D
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統計: A(2), B(1), C(0), D(0), E(0) #3384770
統計: A(2), B(1), C(0), D(0), E(0) #3384770