17. I am ______ to many people for their assistance and advice in bringing this book to fruition.
(A) acknowledging
(B) productive
(C) forgetful
(D) indebted
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統計: A(5), B(1), C(0), D(5), E(0) #3944731
統計: A(5), B(1), C(0), D(5), E(0) #3944731