阿摩線上測驗
21. A recent discovery of the mineral hematite on Mars has sparked discussion among scientists who are determining if water exists on the Red Planet.
(A)accelerated
(B) caused
(C)renewed
(D)invented
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統計： A(0), B(1), C(0), D(0), E(0) #3370666
統計： A(0), B(1), C(0), D(0), E(0) #3370666
