Odpowiedź:
zad 1
2.
a) produced
b) produced
c) producing
3.
a) invented
b) invented
c) discovered
4.
a) by
b) with
c) with
zad 2
2. on
3. was
4. created
zad 3
2b are used
3a isn't described
3b was it described
zad 4
2. is selling
3. it was designed
4. wasn't studied yet
zad 5
2. bc
3. ac
zad 6.
1. are the screens cleaned
2. will be developed by
3. told us
4. weren't done
