The key answer of exercise 3

a)

1. acknowledge
2. allege
3. call for
4. echo
5. illustrate
6. maintain
7. plead
8. relate
9. reprimand
10. repudiate
11. voice
12. vow

b)

1. She / he echoed her / his opponent (in saying that education is key).
2. She / he maintained her / his position is unchanged.
3. She / he vowed never to betray the public's trust. OR She / he vowed that she / he would never betray the public's trust.
4. She / he pleaded for / called for the public to remain calm pending an investigation.
5. She / he reprimanded the opposition for their use of immoral tactics.