31. John is ten years old. If John's parents take him with them to a movie on Saturday, how much do they have to pay?
(A) NT$ 350.
(B) NT$ 400.
(C) NT$ 500.
(D) NT$ 650.
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統計: A(3), B(8), C(3), D(57), E(0) #2353296
統計: A(3), B(8), C(3), D(57), E(0) #2353296