sorta is short of "sort of"?

Do this "is" right here? sentence: With one result being that now even the generally accepted idea of what a planet is is being challenged. There's two "is" in the sentence. did the second"is" right here, in written english? Because I saw there a red underline under the second"is" in Microsoft word.

can "one of" +comparative? or add superlative? Today, I see a sentence: You see, until recently what makes a planet a planet was one of the simpler concepts in astronomy. But in my high school, my teacher told me that after"one of",we can only use superlative, not comparative. Did my teacher right?

“他拥有很广的人脉”英文要怎么说？？

How to use "see" ?? The internet boom saw many companies' business burgeoning. what does "saw" mean? and how to use this structure?

What kind of worker would you choose if you are an employer? This is my TOEFL writing practice. What kind of worker would you choose if you are an employer? Some young guys with nothing to know about the company or a sophisticated men who have 3 or 4 years of working experience. The answer is obvious. But when adding salary in the situation. This can become a dilemma for many HR when facing the great pressure from the board of diminishing costs and boosting profit. As for me, I will chose the experienced one. Here is my reasons. To begin with, experienced workers, when compared to the new workers, will cost little on training and can get to work immediately. This situation will be more obvious in some companies which require high efficiency and professional skills, whose initial training often last more than 3 or more weeks before the newcomers formally go to work. Come with the formal work is often the ceaseless mistakes and inefficiency. This adjustment stage will also last 2 or 3 weeks. To sum up, the whole time cost for a newcomer to become an adept worker would be 2 or 3 months. But all these problems can be solved by an experienced worker in several days, even though they charge a little higher salary. Further more, experienced workers will introduce different ways of problem solving from other companies. Every company has its own culture and own work style, which are advantages that worth other companies to learn from. Experiences from other companies can make comparisons and help the company to improve itself and keep competence in the market. Experience is precious in every company, even not in the same industry, and can make things more easier. However, for an employer, what they care most when choosing a worker is the cost performance. That is, weather the people I employed worth the price they charge. In other words, did their salary equivalent to their ability to enhance the company. What's more, inexperienced workers also have their advantages. After training for several weeks, they are more loyal to the company and will work harder to repay the training. In conclusion, experienced workers worth a higher salary with their sophistication. They can save not only a huge training cost but also the time cost, and bring in more information to keep competitiveness. If I am a employer, I would choose experienced workers with higher salary as my staff.

what does "humble pie" mean?? Today, I've read a piece of news, and it says: Renault is eating a lot of humble pie this year. (Renault is the biggest frech carmaker) So what does "humble pie" mean?