Преобразуйте предложения в страдательный залог.
1.Kazakhstan... (to visit)by many people.
2.A new rule ...(to learn)by the students at the moment.
3.A very difficult task... (to give)to the pupils.
4.Many houses ...(to be) built in our city.
5.The letter and the parcel... (to post)tomorrow.
6.She... (to know) to be a very industious person.
7.The problem ...(to study)for five years but they have not solved.
8.This book ...(to publish) by the end of September.
9.He phoned us and asked if our luggage...(already/to pack)
10.This plant... (to water) two times a week.