18. Some dinosaurs are _______ meat eaters while others are gentle vegetarians which feed on plants.
(A) beware
(B) fierce
(C) humble
(D) stable
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統計: A(39), B(376), C(47), D(19), E(0) #2795805
統計: A(39), B(376), C(47), D(19), E(0) #2795805