Hi Ester!
I'm from the United States, and I am a native English speaker. I'm afraid I can't tackle all of these at once, but I'll discuss a few.
1) This sentence is technically correct, but it doesn't sound natural. A native speaker would say, "This week's tax bill is really expensive."
2) This sentence also sounds unnatural. A native would say, "He will pay for all the pain he caused by dealing drugs."
3) This one is both correct and sounds natural. Great work!
4) This one is almost perfect. You need a "the" before "European economy" to sound like a native.
5) Even though I'm a native speaker, finances aren't my field. So I can't guarantee you that the phrase you have in bold is exactly how a native speaker would say it, but I do think they would totally understand you. The only part of the sentence that sounds strange to me is when you say "I got wrong." A native would say, "I got it wrong."
6) This sounds almost perfect, but I think you should put an "a" before your 10 million, like this "We made a $10 million profit."
7) This is correct!
8) This sounds like a native, but you could have even better writing style if you moved your "with a market value" phrase BEFORE the subject Apple instead of after it.
I hope this helps! You're doing an awesome job!
