the old man is a expert 这里是a还是an?

( )is the old man? ( )is the old man? Who is the old man? ( )grandfather is the old man?A:Who's BWhose The old man is very t____ after a long walk Is there a old man under the tree?改成复数 The old man might is a doctor 改错 The old man may is a doctor.改错 the old man 's age is eighty同义句 He is a man ___ ___ A young man and an old man are walking in the park．The old manA young man and an old man are walking in the park.The old man is behind the young man.There is a chair in front of the young man.The old man is very glad to see the chair.He isn't verys the old man is ___for the beach The old man is 70,he has a good old girl.翻译 The old man is 70,he has a good old girl.翻译 the old man is（ ninety years old?） 提问 （）（ ）is the old man The old man in the car is an old teacher. Is the old man (空格) grandfather? The old man is ___ ill .( terrible) Look!The old man is e____.