I
1 - b) comes back
2 - a) had lost
3- c) will come
4- c) was cooking
5-d) went
6- a) reads
7- a) was writing
8-b) is still working
9-c) I will have read
10-d) will be playing
II.
1 - on foot ( пешком)
2 - .. proud of my country
3 - ...belongs to me
4 - .. interested in the
5 - ... by ship
III
1 - a letter
2 - the most (там вроде как опечатка: должно быть "citY", а стоит во мн.числе-cities?!)
3 - The Volga
4 - play tennis (b)
5 - visit Australia (c)