Помогите с английским пожалуйста11. A presentation of new educational programme

Помогите с английским пожалуйста
11. A presentation of new educational programme already to the delegation from London Business School.
a) was shown b) has been shown c)has shown
12. Last year the election of a new Rector ... by the majority of students, teachers and deans of the faculties.
a) is supported b) was supported c) will be supported
13. When ... the US Constitution ?
a) is adopted b) was adopted c) were adopted
14. The date of foundation of the USUE ... last year.
a) didn't celebrate b) wasn't celebrate c) not celebrated
15. A lot of applicants ... by the selection committee before they became students.
a) had examined b) were examined c) had been examined
16. My friend is planning to visit London this spring. He hopes he by St. Pauls Cathedral and the National Gallery.
a) be impressed b) will impress c) will be impressed
17. Millions of tourists from all over the world ... New York next summer.
a) visited b) will be visited c)will visit
18. The strategy of development of Cambridge University... by professors tomorrow.
a) will be debated b) will be debating c) will debate
19. You ... the computer since seven o'clock. It's time to turn it off.
a) have been playing b) has been playing c) had been playing
20. My sister ... with me for three weeks now. a) is staying b) stays c) has been staying