12. This kind of animal is _____ seen in everyday life because it lives 4,000m under the
sea and is hard to find.
(A) commonly
(B) possibly
(C) seldom
(D) still
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統計: A(8), B(6), C(69), D(4), E(0) #2344174
統計: A(8), B(6), C(69), D(4), E(0) #2344174