23. _____ your encouragement, I would have given up.
(A) If not by
(B) If it was not
(C) Was it not with
(D) Had it not been for
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統計: A(30), B(50), C(16), D(142), E(0) #2647740
統計: A(30), B(50), C(16), D(142), E(0) #2647740