7. Loud noises in factories may _____ factory workers’ hearing.
(A) impede
(B) impersonate
(C) impair
(D) implode
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統計: A(11), B(0), C(30), D(4), E(0) #1725355
統計: A(11), B(0), C(30), D(4), E(0) #1725355