阿摩線上測驗
3. One of the reasons why the tuna swims so fast is because
(A) its tail beats very fast
(B) the shape of its tail is like a propeller on a boat
(C) it has incredible beats
(D) its tail beats 10 to 20 seconds each time.
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統計： A(31), B(8), C(5), D(5), E(0) #788726
統計： A(31), B(8), C(5), D(5), E(0) #788726
