阿摩線上測驗
19. While there are over 300 million carriers of hepatitis B virus worldwide, _______ are unaware that they are
carriers.
(A) most of it
(B) most of them
(C) most of which
(D) most of whom
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統計： A(2), B(75), C(31), D(27), E(0) #1772756
統計： A(2), B(75), C(31), D(27), E(0) #1772756