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第28题 It is a common observation ______ there are no two obje

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第28题 It is a common observation ______ there are no two objects in nature that are exactly alike.
A、that
B、in that
C、which
D、in which
只能选A,这句是一个同时带有主语从句和定语从句的复合句,
1.主语由形式主语it充当,真正的主语为that引导的从句“ there are no two objects in nature that are exactly alike.”,that在这里是主语从句的连接词,而并非定语从句或者宾语从句的连接词.
2.后面定语从句“that are exactly alike.”修饰前面的“two objects”.