6. The benefits of vitamins and minerals are emphasized because they play an
important role in maintaining good health.
(A) helping
(B) keeping
(C) predicting
(D) starting
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統計: A(15), B(139), C(0), D(5), E(0) #683661
統計: A(15), B(139), C(0), D(5), E(0) #683661