In the first place, he says, the process of cooperation in a team may not be as satisfying as stated in the reading.
People who are not dedicated to the team may rely on others to take on more work, and people who are really dedicated...
As a result, people may grow to hold a grudge about working
in the team with a result that few would really shine in such a team.
In the second place, the speaker rejects the idea that work would be finished more swiftly when performed by a team.
People with different beliefs and routes of practice may diverge on some issues, adding to the time needed to finish a job.
And last, the speaker fully defies the positive role of authorities in a group in that more risky yet not worthwhile decisions would be made in a team.---This sentence is sort of unclear, and should be revised for clarity.
In fact, many decisions made by these authorities in a team may involve a lot of risks and others in the team may not dare to speak up against the peril these decisions would put the whole team in[/font], so that dangers may happen.
One of your previous paragraphs started with, 'And last', or actually 'In the last place...' You'll need to get rid of that, seeing it was obviously not the last point you had to make! :)
Besides that, some good and creative ideas could be blocked by these people if [font#FF0000]they personally do not relate to these ideas which can be valuable ones.
In conclusion, team work in fact, contains many potential risks.
Contrary to the benefits in the reading, a team may not be able to bring so many benefits to the individuals in it, and the group as a whole.
On a personal level, it may...
Have fun in school and good luck!