They are going to have a picnic if the weather is nice.

如果天气好，他们要去野餐。

同一单元的其他句子

• Could you please pass me the salt?你能把盐递给我吗？
• I usually have breakfast at seven o'clock.我通常七点吃早饭。
• What time do you go to work every day?你每天几点去上班？
• She doesn't like coffee, she prefers tea.她不喜欢咖啡，她更喜欢茶。
• Let's meet at the entrance of the park.我们在公园入口见面吧。