18. Some pathologists have reached a conclusion ____ a wide variety of factors.
(A) that fatigue results from
(B) fatigue results is because
(C) which fatigue results in
(D) is that fatigue results form
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統計: A(90), B(2), C(11), D(2), E(0) #3425863
統計: A(90), B(2), C(11), D(2), E(0) #3425863