15.People with long-lasting disease, also known as _____ disease, need to exercise.
(A) candid
(B) chronic
(C) cogent
(D) comic
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統計: A(6), B(44), C(0), D(2), E(0) #3276182
統計: A(6), B(44), C(0), D(2), E(0) #3276182