9. It’s better to put the medicines on the ________, or the children might swallow it accidentally.
(A) store
(B)shelf
(C) elf
(D) note
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統計: A(160), B(1877), C(74), D(50), E(0) #1967519
統計: A(160), B(1877), C(74), D(50), E(0) #1967519