根据句意及括号内所给英文或汉语提示，完成句子。

1. —What about _____ (fly) kites this afternoon, Kangkang?

    — Good idea.

2. He often goes _____ (swim) with his classmates on Sunday.

3. I'm _____ (恐怕) I can't come with you.

4. —Don't forget to bring your _____ (吉他).

    — All right.

5. Let’s have a _____ (野餐) on the farm. It’s very fun.