You are right. I have pronounced this word "back nose way" many years. Good that you pick it out today. You know sometimes for these simple words, you just take their pronuciation for granted.
2. wet. sounds like "wite"
You are right. Should make mouth more flat
3. each. sounds like itch
This one I think I am right. Maybe /i:/ is not very longer to you because it is not the key word in the long sentence
4. atmosphere,重音位置
You are right. The stress should be first syllable
5. form,sounds like firm
This one I think I am right. Maybe the /r/ make it
sounds like /e/ upside down instead of /c/ the mirror.
Can't say how thankful I am to your help. No error picking, no progress.