______useful dictionary for beginners of English! Where did you get it?

 —Look at the picture .  ________ big watermelon it is! —Yes. Let’s see how heavy it is .

     bad weather ! I can do something but to stay in bed for the whole day.

---What _____useful book !---Yes, it is. But I find it ______ difficult for me to read.

--- ______ wonderful music!  --- Yes. It’s written by Jay Chou, a pop singer.