Помогите плиз вставить между предложениями слова чтобы грамматически было правильно

1. I like chemistry, that's why I think about becoming a chemist in the  future. 2. I want to thank Paul for (his) giving me a piece of advice. 3. My parents can help me by listening to my concerns. 4. I have a great interest in modelling ships. 5. Ann is really good at speaking English. 6. My parents disapprove of my elder brother('s) working too much. 7. My granny is fond of growing many flowers.