21.
(A) Some one-thousand dollar bills
(B) A five-hundred dollar bill and some one-hundred dollar bills
(C) Some one-hundred dollar bills
(D) Some five-hundred dollar bills and some coins
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統計: A(7), B(8), C(28), D(3), E(0) #3410605
統計: A(7), B(8), C(28), D(3), E(0) #3410605