54. Why do humpback whales do lobtail feeding?
(A) to make slapping sounds
(B) to make other fish afraid of them
(C) to spend more time with lobtail feeders
(D) to catch fish
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統計: A(1), B(2), C(6), D(8), E(0) #1598235
統計: A(1), B(2), C(6), D(8), E(0) #1598235