Dear David,

l've just go back home . I want to say "Thank you!" most at the moment .

You and your parents looked after me well during I stay in English and thanks very much .

For example , you helped me with my English and showed me aroud mang splace , and you mother cooked delicious foods for me .With your help , my English is better and learned about more English culture .I'd like to invite you to come to my home !

Yours,

Jason