is your teacher old?为什么 开头是is 而不是are

is your teacher old?为什么 开头是is 而不是are is teacher your or young English old连词成句 Is your art teacher old and young?哪里错了 How old is your English teacher?中文是什么 Are your teacher very old?/Is yourteacher very old?谁是正确的?其中有一句不是句子. Who is your teacher? where is your teacher Your teacher is ok. your teacher?A,How are B,How old C,How old are D,How is 选哪一个? How old are your teacher什么意思 Is the students' english teacher old or She is a old teacher.改错 Is your English teacher（）? Who is your English teacher? what is your teacher like This is[you your]teacher. how什么is your teacher Who is your art teacher