they are going to have a picnic this sunday对划线部分提问第一个划线部分是have a picnis 第二个划线部分是this sunday

问题描述:

they are going to have a picnic this sunday对划线部分提问
第一个划线部分是have a picnis 第二个划线部分是this sunday

What are they going to do this sunday?When are they going to have a picnic?