16. ( ) The flying saucer, also referred to as
(A) UFO, gets its name since
(B) its saucer-like appearance
(C) and its capacity to
(D) fly.
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統計: A(32), B(31), C(10), D(13), E(0) #2930340
統計: A(32), B(31), C(10), D(13), E(0) #2930340