About one in five Smiths are black, as are about one in three Johnsons, Browns, and Joneses and nearly half the people named Williams.
(A) are black, as are about one in three Johnsons, Browns, and Joneses and nearly half the people
(B) is black, as is about one in three Johnsons, Browns, and Joneses and nearly half the people
(C) are black, as one in three Johnsons, Browns, and Joneses, with nearly half
(D) is black, as one in three Johnsons, Browns, and Joneses and nearly half
(E) are black, as about one in three Johnsons, Browns, and Joneses and nearly half
參考答案 : A
要看成 {one in five} Smiths => 主詞 Smiths ,還是 one {in five Smiths} => 主詞 one?