The United States is composed of_____fifty states, two of are separated from the others by land or water.
The United States is composed of_____fifty states, two of are separated from the others by land or water.
A、them
B、that
C、which
D、those
【正确答案】:C
【题目解析】:因为没有出现连词,所以可以排除them和those,因为如果填这两个词,逗号前后就变成了两个句子,而逗号是不能连接句子的。逗号后面的部分其实为定语从句,修饰fifty states,定语从句修饰物,引导词用that或which,而只有which可以用在介词之后,所以two of后面只能用which,two of which=two of the fifty states。句意为:美国由50个州组成,其中两个被陆地和水与其他州分开。be composed of由……组成。

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