21. Please buy some lunch boxes ______.
(A) from the cafeteria
(B) to the top of the hill
(C) in this forest
(D) down the path by the river
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統計: A(143), B(13), C(12), D(6), E(0) #3887969
統計: A(143), B(13), C(12), D(6), E(0) #3887969