Is he talking to a customer?这里为什么不用"Does",而用"Is"?这里的主语不是第三人称单数吗?应该是"DOES"才对啊?

He is talking to a customer Who is the man___your father is talking to A.he B.it C./ D.him When he saw me,he stopped______to me.A.talking B.to talk C.there is D.is there he is talking to a customer.改一般疑问句 -Is your friend quiet -No he never stops _______.A.talk B.talking C.to talk D.is talking请问是选哪一个? What is your father doing He's is talking ( ) an old man A at B to C in He is always__lies.Listen!He is __nonsense again.A.saying;telling B.talking;telling C.telling;talking D.telling;asying the young engineer he----is a friend of his .A. is talking B.is going to talk C.talked D.is talking to 请问选哪个?这无论选哪个都是两个动词呀? stop talking .he is (hard) to study Is your friend quiet?——No,he never stops( ) A.tIs your friend quiet?——No,he never stops( ) A.talk B.talking C.to talk D.is talking pretends he's talking into a microphone中的talking talking into为什么不是talking to, Old Smith is a lonely man.He doesn't have a person_____.A.to talk B.to talk with C.talking D.talk with The swimmer he is talking to a journalist is from England改错,要说原因的额! The film is worth .A.to talk B.to talk about C.to talking D.talking about . he's talking to a customre right who is the man ____was talking to our English teacher?oh!it is Mr.Barker,our new maths teacher?A he B that C whom Dwhich He is ( ) his mother ( ) his friends A.talking,to B.telling,about c.telling,to请帮我解答.并写出解题思路. Simon is talking ()what he ()on his way to school a with ,see b to ,see c about,sees d in sees