I. Choose the necessary form of Participle
1. The floor (washing, washed) by Helen looked very clean
2. The wall (surrounding, surrounded) the house was very high.
3. Read the (translating, translated) sentences once more.
4. It was not easy to find the (losing, lost) stamp.
5. The book (writing, written) by this scientist is very interesting.
6. Look at the beautiful flowers (gathering, gathered) by the children.
7. I love the noise of (falling, fallen) rain. 8. Watch that car (driven, driving) at full speed.
9. Everything (writing, written) here is quite right.
10. She was reading the book (buying, bought) the day before.