Question

Употребите необходимую форму Passive Voice.
1)What bottles/ to make of?
2)When/ the telephone/ invent?
3) Chees/ to make/ from milk/
4) These houses/ build/ in 1987

Answer 1

1) What are bottles made of?
2) When was the telephone  invented?
3) Chees is made  from milk.
4) These houses were built in 1987.