#2
1. receive
2. buy
3. arrive
4. become
5. obtain
#3
1. wouldn't get
2. would be
3. waited
4. would be
5. left
#4
1. If they went to school they wouldn't be illiterate
2. If you did more exercises you would get fit
3. If i had more money i would go on holiday
4. If you went to bed earlier you would not be tired
5. If i was ill i would go to the hospital
#5
1. Racism is definitely a problem in sport
2. Perhaps it will be better in (the) future
3. We can probably meet after lunch
4. She definitely wants to go to (the) university
5. Probably i'd like to study geography
(Плохой учебник, ошибки в самих заданиях)

4
If they went to school,they wouldn't be illiterate.
If you did more exercises,you would get fit.
If I had more money,I would go on holiday.
If you went to bed earlier,you wouldn't be tired.
If I were ill,I was go to hospital.

5
1 Racism is definitely a problem in sport.
2 Perhaps it will be better in future.
3 Probably we can meet after lunch.
4 She definitely wants to go to university.
5 Probably I 'd like to study geography.