20 We missed the warning _____ and that’s why the car accident happened.
(A) autographs
(B) flaws
(C) signs
(D) stigmas
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統計: A(8), B(8), C(147), D(7), E(0) #3074341
統計: A(8), B(8), C(147), D(7), E(0) #3074341