初三英语补全对话A Hi,Bill.You look unhappy?What's up?B _____________

初三英语补全对话
A Hi,Bill.You look unhappy?What's up?
B _____________.I want to buy some books,but I'm too busy.
A _______________________?
B But I''ve never shopped online before.
A ___________________.I want to buy a book ,too.
B Really?That's good.When shall we shop online?
A How about this afternoon?
B No problem.________________________.
A Yes,it is simple.Just follow the instructions.
B _____________________!Next time,I can buy other things online