The speaker and the author hold divergent attitudes toward whether the company should shorten the work week to four days instead of five. According to the passage, the author thinks (using the word "thinks" is correct, but its more formal and thus maybe will get you a better score to use the word "believes" here instead) that there are many is lots of benefits for the company as well as society. Through relevant reasons and examples, the lecturer extensively refutes the optimistic viewpoints stated in the reading material. 

(The word "lots" is quite informal, so in writing we tend to avoid using the word "a lot" or "lots." Same for the word "bunches” it is more informal so we do not usually use it in writing)

As the passage declares, a company that allows employees to have fewer working hours can hireing more staff to ensure the work is be accomplished on time without additional costs. Also, the employees who enjoy more leisure time make fewer mistakes and work more efficiently to increase the company's profits. To rebut this idea, the professor claims that it actually forces the company to spend more. Hiring more workers always requires more computers and more spaces.Training before work and things like that also costs a great deal bunch of money.Thus, the assumption of the author is severely weakened by the professor's rebuttal.

Second, the author says that the policy would reduce unemployment rates for the whole country. Yet the professor insists that the company would expect the its employees to finish five days of work in four days rather than hire more people. So even though the employees get an extra day off, they will work later every night to finish the job tasks that their boss leader expect them to do. Obviously, this statement sharply contradicts that stated by the writer. forms a sharp contradiction against what is stated by the write. 

(In the Chinese language I often see the word "contradiction" 矛盾 used in the way you used it in Englis here. In English however we rarely use the noun form "contradiction," we use it more commonly as a verb.)

Finally, opposing the author's belief that the employees could improve the quality of their lives, the professor contends that the employees would worry afraid that they may be unable to can't get promoted because their boss would rather give a promotion to more intend to raise those that who work five days a week which completely rejects the opinion shown in the passage.

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This is a great response! I bet you'll do great on the TOEFL. One thing I would recommend is to try to have some shorter sentences in between your longer sentences. Although in the Chinese language it seems that super long sentences are ok, in English we call sentences that are too long "run-on sentences." Native English speakers will accidentally do run-on sentences too, because its hard when you have a complex thought, but its best to try to limit sentence length to at the very most a little past two lines. Also, when you write long sentences, put a short sentence in between to vary your sentence structure. :) 

Let me know if you have any questions! If you have some extra time, please check out one of the Notebooks I posted today in Chinese. There's some phrases I posted in the comments of my Notebook that I am unsure about, but cannot create another Notebook for today. Thanks！