I am truly happy to hear the news.这里为什么添tryly而不是true?

I am truly happy to hear the news.这里为什么添tryly而不是true? Lm truly happy to hear the news.为什么用 truly? Lm truly happy to hear the news. I am very happy to have you! I am very happy to work here I am happy to be with you I am happy to share with i am so happy to learn I am happy to be invited.why i am so happy to learn I am happy to have 、急 i am happy to join you I am happy to help you.I am ( ) ( )help you. Truly and wholeheartedly say:I am sorry! i am very happy to have chance to be I am happy! I am so happy I am so happy.