1. You have to learn new skills no matter how much experience you have.(或no matter how experienced you are) 2. Another question is that who will be sent to lead the researching. 3. They faced a little trouble at the begining of their relationship because of their different cultures. 4. Although he has experienced a lot, I still believe that he will succeed some day. 5. I hold my opinion about the realness of your saying. 6. She is not so tall but she is thin, which gives others an illusion that she is tall. 希望这些对你有帮助.