1 - b
2 - a
3 -a
4 - c
5 - a
6 - b
7 - b
8 - a
9 - b
10 - c
11 - a
12 - b
13 - a
14 - b
15 - b
16 - b
17 - b
18 - a
19 - b
20 - c
Dear friend,
I am writing to ask you about your college enrollment process. Had you already passed all the exams? Does your college have any specific or unique requirements for new students? Also, I know you are very good at math, but you have never told in which specialization you are interested in. Did you choose finance or another field of economics? I think to choose a career is a very difficult decision, and I hope you have a well-prepared plan to follow.
For example, in my country to enroll for a university programme you have to pass school's exams which are obligatory for everyone and also write some kind of tests in university to prove your knowledge.
Anyway, I hope you are doing well.
Best regards,
Ivan
Undertake, undertook<span>, </span>undertaken
buy, bought, bought
sell, sold, sold
give, gave, given
set, set, set
mean, meant, meant
Остальные глаголы - правильные, заканчиваются на -ed.