_______________ useful message he got from his mobile phone this morning! 

-- _____ lovely weather!     -- Yes! Just right for walking.

 -_______ enjoyable trip we had during this Spring Festival in Beijing! -I can't agree more.

--- ________ great fun chatting online is！---But it may cause you a lot of trouble.

—      useful suggestion he offered to us!—You’re right. It was of great     .