17. _______ for 40 years, my father found it difficult to quit.
(A) He smoke
(B) Having smoked
(C) After smoked
(D) Being smoked
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統計: A(4), B(200), C(15), D(17), E(0) #3294397
統計: A(4), B(200), C(15), D(17), E(0) #3294397