jack is talking to his friend (who提问）理由

jack is talking to his friend (who提问）理由 Who is jack talking with? he is talking to his friend at the moment David is talking to his friend in the phone David is talking to his friend in the phone. a,Jack,letter,is,friend,reading,from,his,his,mum,to（.）连词成句 jack was talking to his friend on the phone ____the door bel to,students,talking,about,is,his,holiday,who,the friend Jack writing an his to is e-mail He is writing to his friend.对friend提问? his grandmother is talking to his mother对划线部分提问.划线部分是his mot （ ）Jack is e-mailing his friend _____the Net now.