阅读对话，回答问题。(10分)
John：Hello，this is John speaking.
Mary：Hi，John，this is Mary. What are you doing?
John：Oh，I'm doing my homework. What's the matter?
Mary：Next Sunday is my birthday，would you like to come to my birthday party?
John：Next Sunday？What's the date that day?
Mary：It's June 13th.
John：What time does it start?
Mary：At seven in the evening.
John：OK.I will come on time.
Mary：Great！Welcome to my house!
John：Thank you！Bye!
Mary：Byebye!
（1） What is John doing?
_________________________________________________________________
（2） When is Mary's birthday?
_________________________________________________________________
（3）What time does the party start?
_________________________________________________________________
（4）Will John go to the party?
_________________________________________________________________