1. I'm glad to hear that our library will improve its service. My letter put forward some suggestions.

Can you tell me whether you can provide a double room with a private bathroom and the price?

I wonder if I can change to an easier course.

I am writing this letter to apologize for the mistakes in my work.

I sincerely hope that you can understand my situation and accept my apology.

6. Thank you again for your lovely gift and wish you a happy New Year.

Thank you for the picture book you sent me. The pictures are wonderful. I will like this book.

I am glad to invite you to spend the Spring Festival with us.