Jawaban:
1. Please sit (down)
2. Don't worry, i am (here) to help you
3.His room is a mess. He put his stuff (everywhere)
4. I am so glad that my best friend lives (Nearby)
5. The girl is bored.She want to play (outside)
6. The bus will stop (there)
7. The bird flying (away)
8. Walking (Backwards) is difficult.
9. Look (upwards) You'll see the birds.
10. He put the book inside the book case
Penjelasan:

Maaf jika jawaban saya salah (karena saya tidak terlalu jago)
Dan maaf jika ada yang typo Terimakasih.