2. Both these students know English well. 3. Both my father and mother were workers.4. Maxim Gorky wrote both novels and plays.5. Both protons and neutrons have practically the same mass.6. You should make use of both the articles in your research.​

1. a) We listened to the girls singing Russian folk songs.

b) We listened to the Russian folk songs sung by the girls.

2. a) The girl washing the floor is my sister.

b)The floor washed by Helen looked very clean.

3. a) Who is that boy doing his homework?

b) The exercise done by the pupils were easy.

4. a) The house surrounded by tall trees is very beautiful.

b) The wall surrounding the house was very high.

5. a) The girl writing is our best pupil.

b) Everything written here is quite right.

6. a) Read the translated sentences one more.

b) The pupils translating a very difficult text are tired.