They have a picnic on Sunday.

他们星期日去野餐。

同一单元的其他句子

• I have music class on Monday.我星期一有音乐课。
• What do you do on Tuesday?你星期二做什么？
• We play sports on Wednesday.我们星期三做运动。
• Do you like art class on Thursday?你喜欢星期四的美术课吗？
• She reads books on Friday.她星期五读书。