A: Good afternoon, Jim.

B: Good afternoon, Alex.  ____?

A: My birthday is on May 3rd.____?

B: My birthday is on November 27th.

A: Oh, today is your birthday, right?

B: Oh! I forgot(忘记) it.

A: ____You can call our friends -- Jenny, Mike and Bob. And we can have dinner at your home.

B: That's great. But I forgot Jenny's telephone number.____?

A: It is 365-4052.

B: ____?

A: I think pizza (披萨) is great, and we can go to the store to buy a birthday cake and some fruit.

已知数列{a_n}的前n项和为S_n，对一切正整数n，点P_n（n，S_n）都在函数f（x）=x²+2x的图象上，记a_n与a_n+1的等差中项为k_n．

我是拼音小能手。