Word formation

The following words from the text have one common feature – negative affixes. Read the rule below and make the opposites to the words using the affixes in- (il-, ir-, im-), un-, dis-, mis-, non-, -less:
unclear     discover     invalid     immaterial     wireless

Are there any rules?
There is no rule. The most usual and the most used is "un-". "in-" is a prefix from Latin, so it is usually seen with Latin roots or with one syllable native English roots. "in-"changes to "im-" before "m", "p", and "b". It changes to "il-" before "l" and to "ir-" before "r". "dis-" creates a negative state or the absence of something. The affix "-less" negates a quality and it is the opposite of "-ful". "-mis-" has the meaning of something wrong. Always consult a dictionary. HELP

1.responsible
 14.complete
2.logical
 15.professional
3.advantage
 16.patient
4.published
 17.care
5.take
 18.radiate
6.migrate
 19.do
7.profit
 20.fiction
8.accurate
 21.understood
9.behaviour
 22.connect
10.real
 23.use
11.count
 24.possible
12.regular
 25.literate
13.home
 26.directly
    
Complete the sentences with the correct word from the previous exercise. The words are used only once.
a)
It is necessary to train company’s    staff.
b)
I completely    what she said.
c)
The advantages of the scheme outweighed the  .
d)
He knew it was    even to make an attempt.
e)
Many people have    expectations of what their job will be like.
f)
They had to    most of the work of the previous manager.
g)
Most elderly people in our country are computer  .
h)
All the maps we had were wildly  .
i)
It would be    to ignore the situation.
j)
I’d been waiting for twenty minutes and I was getting  .