第10题: [单项选择](Historically) (there) (has been) (only) two major factions(部分) in the Republican Party -- the liberals and the conservatives. A. Historically B. there C. has been D. only 参考答案:C 答案解析:将C选项has been改为have been。there be句型中的主语为be后的名词,谓语即be的单复数与它后面的名词的数保持一致。two factions为复数,故用have。该句的意思是,“