28. A coral reef consists in millions of tiny coral polyps, which are a form of small animal related to
biocomposites of calcium carbonate.
(A)consists in
(B)are
(C)a
(D)animal
(E)related to
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統計: A(51), B(18), C(6), D(7), E(4) #2751923
統計: A(51), B(18), C(6), D(7), E(4) #2751923