3. doesn't answer
6% ok
Expensive 6%
5%
Good
83%

4. doesn't like it
5%
doesn't
know
unnecessary
5%
5% very good
21%
ok
11%
uselful
21%
it has practice
32%

5. it's necessary
26%
didn't understand
37%
bad quality sound
11%
ok
26%

6. class participation
30%
writing
55%
completing sentences
4%
tests
11%

7. the past participle
5% all
5%
passive voice
5%
tests
10%
the book
5% none
55%
class work
15%