In the United States, while the number of foreign-born residents and their children is higher than ever, the percentage of the population they represent is not; in 1910 this group made up 35 percent of the population when compared to 20 percent in 2000.
population when compared to 20 percent in 2000
population as compared to 2000, when it was 20 percent
population, comparing it with 20 percent in 2000
population, unlike 2000, with 20 percent
population, compared with 20 percent in 2000
比较对象是两个不同的比例。
A选项"when compared to 20 percent in 2000"是伴随状语,主语是this group.而显然1910年的group无法构成2000年的比例。语义不正确。
E选项compared with 20 percent in 2000是定语,修饰35 percent of the population.
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