91. What is NOT mentioned as a feature of the magical book vending machines?
(A)They are easy to use.
(B)They provide surprises.
(C)They are made of candy.
(D)They contain great stories.
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統計: A(48), B(83), C(903), D(57), E(0) #3120969
統計: A(48), B(83), C(903), D(57), E(0) #3120969