Помогите, пожалуйста решить!Exercise 3. Transform the sentences into the active voice. 1....

Question

Помогите, пожалуйста решить!Exercise 3. Transform the sentences into the active voice. 1. English is spoken by people in Australia. 2. The letter hasn't been received yet. 3. A new research on cancer is being carried out. 4. Peter was called by the headmaster. 5. Mary is being helped with her homework by Ann right now
Exercise 2. Transform the sentences into the passive voice where possible. 1. Paul gave me a nice sweater for my birthday. 2. Mary has sent Paul some nice postcards. 3. Mum cooks Pete and Sam a tasty meal every day. 4. The letter arrived two weeks ago. 5. Sue will write a very good essay. 6. Dad had lost his glasses again. 7. My grandparents went to bed late yesterday.
Exercise 3. Ask questions using the passive/
1.About the bicycle (when/invent)
2. About Saint Petersburg (who/found)
3.About gold (what/use for)

Answer 1

1.People speak English in Australia. 2.Noone recieved the letter yet. 3. They're carrying out a new research on cancer. 4.The headmaster called Peter. 5.Ann helps Mary with her homework.
Exercise2.
1.I was given a warm sweater by Paul for my birthday. 2.Some nice postcards were sent to Paul from Mary. 3.A tasty meal is being cooled by Mum for Paul and Sam every day. 4.(то же самое). 5.A very good essay will be written by Sue. 6. The glasses were lost by dad again. 7.(то же самое).
Exersise 3.
1.When was the bycicle invented? 2.Who was Saint Petersburg found by? 3.What is gold used for?