为什么This is Ann an that is her mother.谓语动词用is

为什么This is Ann an that is her mother.谓语动词用is This is a ___.her __is Ann. IS this leter from kate to Ann This is our classroom.This desk is_______(Amy and Ann) This is an alarm clock 为什么要用an? look!this is an“F”(为什么用an) Ann is an English Ann's nationality is .给学生讲课的，pl Ann is an (actor).(就括号部分提问)what ____Ann_____? Ann is going to do homework this evening的回答 This is her an eraser.与This is her eraser.This is her an eraser.与This is her eraser.为什么不用“an”? this is an orange.it is orange.为什么第一个加an,而第二个不加an No,I‘ll finish it in_____ten minutes.A.else B.more C.another D.other 为什么选C Who is that speaking?为什么it's ann 为什么不是this is ann speaking Is this an egg? this is an easy this is an Is this an eye? Is this an umbrella this is an