Teachers,thank you for listening to my questions and offering valuable suggestions. 

I'd like to express thanks to my teachers for listening to my questions and giving valuable advices. 

Many thanks to my teachers for listening patiently to my questions and offering me valuable advices. 

Teachers,thank you for listening to my questions and offering valuable suggestions. 

I'd like to express thanks to my teachers for listening to my questions and giving valuable advices. 

Many thanks to my teachers for listening patiently to my questions and offering me valuable advices.