Перефразируйте предложения, сохраняя его смысл.используйте страдательный залог. 1)my friends invited me to the party. 2)he learns english as a second language. 3)i will send this letter tomorrow.

1. I was invited to the party by my friends.
2. English is learned by him as a secong language.
3. This letter will be sent by me tomorrow.

There are many competing theories about the origins and nature of UFOs. For example, researchers Brad Steiger and Sherry Hansen Steiger have a list of seventeen theories at their website. In UFO: The Complete Sightings (1995) by Peter Brookesmith, there is a list of nine theories. Further, these theories are often categorized.In The Mammoth Encyclopedia of Extraterrestrial Encounters (2001) edited by Ronald D. Story, the subject is divided into “conventional (unintelligent)” and “unconventional (intelligent)” encounters.

1.Заполните пропуски в предложении.
Ann asked the worker since when … at this factory?
Выберите один ответ:
а)he had been worked
б)have you been working
в)has he been working
г)he had been working
2.Заполните пропуски в предложении.
By the end of this year he … as a teacher for 10 years.
Выберите один ответ:
а)will been working
б)will have been working 
в)will work
г)will have worked
3.Заполните пропуски в предложении.
Ann explained that she … the newspaper since five o'clock.
Выберите один ответ:
а)have been reading
б)had been reading
в)has been reading
г)had read
4.Заполните пропуски в предложении.
Next year he… here.
Выберите один ответ:
а)will not works
б)will not have been working
в)will not be working
г)will not work
5.Заполните пропуски в предложении.
He asks how long … at this company?
Выберите один ответ:
а)she had been working
б)had she been working
в)has she been working
г)she has been working
6.Заполните пропуски в предложении.
Ann … the newspaper since five o'clock.
Выберите один ответ:
а)has read
б)have read
в)has been reading
г)was reading
1)в
2)а
3)в
4)в
5)г
6)в