IS YOUR TEACHER VERY FRIENDLY 用ARE 还是IS?

IS YOUR TEACHER VERY FRIENDLY 用ARE 还是IS? Who is your english teacher and math teacher这句话对吗?是用is还是are Our English teacher is very friendly.(同意句转换） Our teacher is very friendly ,so e___likes him He is very friendly How is your English teacher?如何回答 是用He is very kind.还是用He is Are your teacher very old?/Is yourteacher very old?谁是正确的? 是：Are your teacher in the office?正确还是Is your teacher in the Our g_____teacher is very friendly. My English teacher is very kind and friendly 对very kind and Ours teacher is very friendly .We like her very much .这个句子哪里 who( )your english teacher and maths teacher? 填are还是is?为什么?