主谓一致
　　11、Tom’s teacher and friend Mr. Smith.
　　A.are B.is C.are being D.has
　　12、Your new clothes fit you, but mine me.
　　A.doesn’t fit B.don’t fit C.doesn’t fit for D.don’t fit for
　　13、Neither he nor I for the plan.
　　A.am B.are C.is D.were
　　14、Many a student that mistake before.
　　A.has made B.have made C.has been made D.had made
　　15、Peter, perhaps John, playing with the little dog.
　　A.is B.are C.were D.seems

　　参考答案：
　　11、B Tom’s teacher and friend，因friend前没有冠词，所以实际指的是同一个人。
　　12、B 根据前一分句的意思，第二分句中的mine指的是“my new clothes”，因 此主语是复数。
　　13、A neither…nor…连接主语，动词与后面的主语保持一致。
　　14、A