考试类型:Writing > Identifying Sentence Errors
The following sentence contains either a single error or no error at all. If the sentence contains an error, select the one underlined part that must be changed to make the sentence correct. If the sentence contains no error, select choice E.
Most states （A）have various levels of football competition in （B）theirhigh schools so that schools with （C）similar numbers of students compete only against（D）them. （E）No error
解析: The error in this sentence occurs at (D), where there is illogical pronoun use. It doesn’t make sense to say that schools competed against “them” when “them” could refer to “high schools,” “schools,” or even “students.” Instead, “one another” or “each other” is needed.