从方框中选择适当的句子补全对话，有两项多余

Betty: Hello, Lingling.

Lingling: Hi, Betty.

Betty: （1）____________

Lingling: I am going to do my homework. （2）____________

Betty: I am going to have a piano lesson.

Lingling: What are your plans for Sunday morning?

Betty: Sunday morning? I am going to buy some clothes. Would you like to go with me?

Lingling: （3）____________ （4）____________

Betty: Let’s meet at the gate of the post office.

Lingling: OK. （5）____________

Betty: At eight o’clock in the morning.

Lingling: All right. See you then.