3. The boy swiftly picked up the fallen leaf before other people _____ on it.
(A) brooded
(B) squatted
(C) trampled
(D) ventured
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統計: A(12), B(31), C(128), D(28), E(0) #2089953
統計: A(12), B(31), C(128), D(28), E(0) #2089953