用所给单词的适当形式填空。
1. Let's _____ (phone) Kate.
2. Mr Li often encourages me _____ (work) hard.
3. I would love _____ (speak) English with you.
4. Please speak _____ (slowly), I can't follow you.
5. It's hard _____ (learn) English well.
6. The children are playing on the playground _____ (happy).
7. I must buy a new pen, because my pen is_____ (miss).
8. They are all by _____ (oneself) today.
9. The old woman looked very _____ (worry).
10. Which island is _____ (far), the first one, the second one or the third one?