1, to play
2 writing
3 painting
4 to play
5 to be
6
to have
8 studying
(A lot of houses) are built ...
(When) was (this letter) written
(The letter) was written ...
(Whom will this article) be translated ...
(The article) has already been translated ...
(This question) was being discussed ...
(They) are being examined (now) ...
(By the time they arrive the work) will have been finished.
How many eggs does she eat every day?
How much apples do they eat at breakfast
1. - модель 3 (как указано).
2 и 4 - модель 1
3 - модель 2